S. Keszthelyi

Hungarian University of Agriculture and Life Sciences (MATE) · Department of Agronomy

Qualitative and quantitative parameters of tomatoes are impaired by Halyomorpha halys Stål (Hemiptera: Pentatomidae), which cause severe economic losses worldwide. Our aims were to assess H. halys-induced tissue damage in tomatoes via computer tomography and to confirm the results of imaging obtained by analytical methods. Our examination confirmed...

A well-known insect phenomenon is colour polymorphism, from which the species hopes to gain some ecological advantage. Herbivores adapt to the colours of their environment to reduce their chances of becoming prey, while predators use camouflage colours to succeed in hiding from prey. The larvae of the cosmopolitan, highly invasive cotton bollworm (...

The choice of effective crop protection technologies is a key factors in the economical production of oilseed rape. Insecticides belonging to the group of active substances butenolides and diamides are active substances available as seed treatments in oilseed rape and promising control tools in the crop protection technologies. Our laboratory exper...

The cypress jewel beetle, Lamprodila festiva, as one of the most destructive local invasive pests in Europe is currently an extreme threat to the coniferous Cupressaceae trees. The beetle spread at an unprecedented pace and intensity and poses a threat to many countries. Our study aimed to map the Palearctic distribution of L. festiva and measure t...

The potency of vacuum and oxygen absorption-based treatments for controlling Sitophilus granarius L. damage in wheat grains was compared under laboratory conditions. The efficacy of the treatment methods was evaluated at different temperature ranges (-5, 26, 42 °C) and exposure times (0.5, 1, 3, 6, 24, 48, 72 h). The survived imagoes were measured,...

Climate change requires the introduction of alternative crops in certain temperate areas due to the warmer and drier growing seasons. Maize, one of the most important crops, is projected to become less tolerant of a drier climate. Therefore, it is necessary to find an alternative species that is less susceptible to environmental stressors. This stu...

After decades of development, neonicotinoids were widely used in Hungarian sugar beet production and seeds included thiamethoxam treatment by 2019 increasing protection against early spring pests. In Hungary, neonicotides’ influence on bee health led to their removal of emergency authorization. In the absence of thiamethoxam in 2020, experience sho...

The objective of this study was to characterize the effects of barley powdery mildew infection on wheat via the evolution and dynamics of chloroplasts and oxidative processes based on in vivo measurements of ultra-weak photon emission, parallel measurement of chlorophyll and ascorbic acid content, and molecular identification of the pathogen. The r...

Weeds are responsible for a significant proportion of agricultural production losses. Common ragweed (Ambrosia artemisiifolia L.) has become the dominant weed in much of the northern hemisphere over the last century and is projected to further expand northward with climate warming. Not only does it cause damage to agriculture, but it also poses a s...

A „Szántóföldi kárdiagnosztika” című könyvben arra vállalkozom, hogy e termelési komplexum egy apró szegmenséhez, konkrétan a károsító állati szervezetek elleni sikeres fellépéshez a kialakított kárképek és kárkiváltók bemutatásával támogatást nyújtsak. E célkitűzésnek megfelelve az egyes kártételek sikeres azonosítása érdekében a felvezető gondola...

Cameraria ohridella is one of the most invasive pests of horse chestnut. Cyantraniliprole is one of the most perspectively active insecticides, which can transport within the plant in several ways, and its efficacy against this pest has not yet been tested. All three modes of application were effective against the target pest, but there was a diffe...

Deák Ferenc utca 16. Az őszi búza-hasonlóan az egyéb kalá-szos rokonnövényeihez-kiterjedt károsító együttessel rendelkezik. E jelenség az eurázsiai (palearktikus) géncentrumú növények esetében általános sajátság. E növények előállítása során kiemelt jelentősége van a termesztés technoló-gián belül a károsítók elleni sikeres védekezés-nek. Természet...

Az őszi búza gyomflórája az utóbbi évtizedekben jelentős változáson ment át. Az országos szántóföldi gyomfelvételezések adatbázisából már 1947 óta nyomon tudjuk követni a változásokat. Egyes, klasszikusnak számító ún. "gabonagyomok" jelentősége visszaszorult (vetési konkoly, kék búzavirág, mezei szarkaláb, pipacs), míg mások előtérbe kerültek, amel...

The granary weevil, Sitophilus granarius (L.), is considered a serious pest in stored grain worldwide. As residual-based protection possibilities become scarcer, the development of eco-friendly control technologies that can be implemented in practice is becoming urgent. In this spirit, our objective was to assess the effectiveness of different leve...

Most beekeepers worldwide use the same combs in their hives for many years, which can result in alterations in the inner volume of the comb cells. The objective of this survey using microcomputed tomography was to reveal developmental disorders caused by this beekeeping practice. The extent of the thickening of the wall of brood cells that occurs a...

Sap sucking heteropteran cereal bugs-members of the Eurygaster and Aelia genus-are serious pests of wheat. Moreover, they feed on a variety of gramineous plant species, including rye, barley, oat, maize, and millet. They are widely distributed in the European continent. The purpose of this review paper is twofold ; it summarizes the currently avail...

Tetranychus urticae is a severe threat and a major source of yield loss in some agricultural and horticultural crops and it is also as a vector for several viruses. The number of active substances used against the pest is limited. Therefore, there is a continuous need for new active substances. Recently, lithium salts have been shown to be one of t...

The non-invasive diagnostic methods represent a new branch of insect diagnostics, which can provide novel information especially about insects with hidden lifestyle. Computed tomography (CT) is one of the most useful non-destructive techniques allowing for both qualitative and quantitative assessments. The aim of the present study was to attain ent...

The accidentally introduced ragweed leaf beetle ( Ophraella communa ) is a most promising biological control agent for common ragweed ( Ambrosia artemisiifolia ), which herbivore has already emerged in several areas of the Palearctic region. The aim of our study was to model the expansion of O. communa and the number of generations in the various P...

The successful production of maize is fundamentally determined by a good choice of tillage type. Options include conventional tillage based on soil rotation, as well as a more recent conservation approach. Our aims were to determine the stress physiological effects of the plant remains left behind by different tillage procedures on the juvenile mai...

Oulema melanopus L. (Coleoptera: Chrysomelidae) is one of the most serious pests of winter wheat that causes peeling of the epidermis and tissue loss. The complex mapping of the physiological responses triggered by O. melanopus as a biotic stressor in winter wheat has not been fully explored with the help of non-invasive imaging and analytical assa...

The aim of our three consecutive years (2017–2019) field trial was to obtain information as to the effect of weather conditions of the actual year as well as to assess the impact of some technological parameters such as fertilisation, the choice on the hybrid type on the yield parameters, phytosanitary conditions and mycotoxin contamination of maiz...

The granary weevil Sitophilus granarius L. is a pest causing substantial damage to stored wheat worldwide, against which the elaboration of sustainable control methods has recently been gaining importance. Our objective was to assess the efficacy of a rapid atmospheric convection heat transfer method against S. granarius under laboratory conditions...

A cukorrépa (Beta vulgaris L.) Európa és hazánk első számú cukorforrásként termesz-tett növénye. A "szántóföld királynőjeként" is ismert kultúra egyben az egyik legfiatalabb haszonnövény is, mely termesztésének fellendülését a XIX. század eleji kontinentális zár-lat okozta nádcukor behozatali korlátozásnak köszönheti. Természetesen elsődlegesen, mi...

The cypress jewel beetle Lamprodila (Palmar) festiva is a wood-boring pest posing a major threat to the phytosanitary conditions of several coniferous trees. Its unprecedented European expansion has triggered serious plant protection concerns in several new habitats. Parts of Chamaecyparis lawsoniana injured by L. festiva were collected and analyse...

Sunflower production plays an important role in global industrial oil production. Two-spotted spider mite, Tetranychus urticae , is a dangerous, polyphagous arthropod pest with a cosmopolitan distribution, which can endanger the economic features of global sunflower production. It is widely known that pests trigger various reactions in host plants....

The honey bee (Apis mellifera L. 1778) is an essential element in maintaining the diversity of the biosphere and food production. One of its most important parasites is Varroa destructor, Anderson and Trueman, 2000, which plays a role in the vectoring of deformed ing virus (DWV) in honey bee colonies. Our aim was to measure the potential morphometr...

A termény és élelmiszertárolás során megjelenő kártevők egyaránt sújtják a növénytermelést és annak feldolgozó szektorát. Így tevékenységük közvetlenül kihat a mező- és az élelmiszergazdaság hatékonyságára. Számos esetben a konkrét kárkiváltóval nem, csupán annak kártételével, az ürülékével, néha szövedékével szennyezett termékkel szembesül az embe...

Pea (Pisum sativum L.) is an important leguminous plant worldwide, in which pests trigger significant damage every year. One of the most important pest is pea weevil (Bruchus pisorum, L) which causes covert damage in crops. In the present study, our aim was to obtain precise information pertaining to the extent and the nature of damage in pea cause...

The insecticidal efficacy of the experimental bioinoculants (Natur Nova, Natur Agro Hungary Ltd., Hungary) containing Beauveria bassiana (Bals.-Criv). Vuill. and Metarhizium anisopliae Metschnikoff against stored product pests modelled by granary weevil, Sitophilus granarius L. was evaluated on wheat in laboratory tests. In order to comparability,...

Holartctic expansion of Neoclytus acumiantus acuminatus due to its polyphagous character has been a major concern for plant health, which raises several questions about its spreading directions. I have examined all bibliographical references, phytosanitary reports and authentic photographs from the online sources in the quest of the determination o...

The cypress jewel beetle Lamprodila (Palmar) festiva (L.) (Coleoptera Buprestidae) is a wood-boring pest posing major threat to the phytosanitary condition of several species of Cupressaceae. It has spread northwards in Europe over the last few decades and has recently become a major concern for plant health. The suppression of its rapid invasion c...

The ectoparasitic mite, Varroa destructor , is a most important health risk for European honey bee subspecies (Apis mellifera) globally. There is a scarcity in experimental approaches addressing this issue by using computed tomography. Our purpose was to determine the decrease in the volume, surface, density and weight alteration triggered by V. de...

The damage of the European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), causes is mainly determined by the success of its overwin-tering. The aim of our study was to assess the consequences of the artificial cooling on the movement and survival ability of overwintering larvae of O. nubilalis by using computer-assisted tomograph...

Sitophilus granarius (L.) is an important pest of stored grain worldwide. In recent years, sustainable methods against it have received attention as grain stock protective means. Our aim was to obtain information about the efficacy of infrared irradiation (IR) against S. granarius in laboratory conditions. The change in adult-activity and median le...

Jelen kiadvány létrejöttének hátterében az Agrofórum Kiadó Kft. szerkesztőbizottságának és az ADAMA Hungary Zrt. munkatársainak azon törekvése húzódik meg, melynek fő céljai a fontosabb kártevőkkel kapcsolatos aktuális védekezési információk egységes megjelenítése és azok termelőkhöz történő eljuttatása. A bemutatott kártevők kiválasztásánál, a faj...

The insecticidal efficacy of microwave irradiation against the at 12, 24, 48 and 72 h following exposure to microwave irradiations (100, 300 W) and the progeny production was assessed 45 days later. Linearly increasing irradiation power range (100, 200 and 300 W) was set up for determining mortality tendency. An increase of insect mortality caused...

Pine wood nematode (Bursaphelenchus xylophilus) (Aphelenchida: Parasitaphelencidae) is one of the most harmful agents in coniferous forests. The most important vectors of pine wood nematode are considered to be some Monochamus species (Col.: Cerambycidae), which had been forest insects with secondary importance before the appearance of B. xylophilu...

The expansion of Ostrinia nubilalis Hbn. (Lepidoptera: Crambidae) was mapped with the help of its biological constants and climatological data based on a 55.8×55.8 km grid of ECMWF ERA-Interim dataset in Europe and North America, in order to determine the tendency of the expansion of the ecotypes between 2003-2018. In the quest of visual mapping of...

There are several harmful and yield decreasing arthropod pests, which live within plant tissues, causing almost unnoticeable damage, e.g. Ostrinia nubilalis Hbn., Cydia pomonella L., Acanthoscelides obtectus Say. Their ecological and biological features are rather known. The process leading to the damage is difficult to trace by means of convention...

Worldwide distribution and theoretical spreading of Trichoferus campestris (Coleoptera: Cerambycidae) depending on the main climatic elements

The technology of grain corn production has recently been continuously changing due to spreading of insecticidal in-crop treatments in Europe. The aim of these interventions is to prevent damage caused by serious lepidopterous pests in maize. We carried out in-maize field experiments using two different active ingredients of insecticides in four co...

Napjaink növénytermelési tevékenységének alapvető, elengedhetetlen eleme a kártevőkkel szembeni sikeres védekezés. Természetesen e védekezési beavatkozásokat már környezettudatosan, az integrált növényvédelem (IPM) szellemében szükséges kivitelezni, amelybe beletartozik az ember és környezetének, különösen a beporzó rovarok védelme is. Az említett...

The velvet longhorned beetle, Trichoferus campestris (Coleoptera: Cerambycidae) is a serious wood-boring pest that is a major threat to the phytosanitary condition of forests and orchards. Its worldwide expansion is a major concern for plant health. We have collected all bibliographical references, phytosanitary reports and authentic photographic e...

Ecology and life characteristics of overwintering larvae of the European corn borer (Ostrinia nubilalis Hbn.) (Lep.: Crambidea) are partly unexplored due to their hidden lifestyle. In plant protection research the best way to study these phenomena is to apply less used, non-destructive, in vivo methods. The objective of our CT survey was to examine...

This study addresses the question whether to what extent (if any) light-trap catch of the harmful pest, Helicoverpa armigera (Hübner, 1805) (Lepidoptera: Noctuidae) depends on the Moon phases and the geomagnetic horizontal component (H-index). Therefore, daily relative catch data were assigned to the daily values of geomagnetic field above 0.2125⁻¹...

Előszó Szinte már közhelynek számít az a bevezető gondolat, hogy a világ és ennek részeként hazánk agráriumának is – legyen az növénytermesztés vagy állattenyésztés – számos, új kihívással kellett szembenéznie az elmúlt évtizedekben. A korábban nem tapasztalt ütemű változás nem csupán az agrárium, de az ipar egyéb területein és a mindezeket körülöl...

The study examined the light-trap catch of the Scarce Bordered Straw (Helicoverpa armigera Hübner) (Lepidoptera, Noctuidae) depending on the sunspot numbers. The catching data of examined species were taken from the light-trap registers of the Hungarian Light-trap Network. During the years between 1993 and 2011, 25,531 moths were caught by the 36 l...

Leguminous plant products have great nutritional and economic importance in the European Union, which is reflected by its protein policy. These harvested yields are risked by stored product pests, such as Acanthoscelides obtectus Say, which can cause up to 50–60% loss in stored bean items. The bean weevil causes both quantitative and qualitative da...

The longhorn beetle fauna (Coleoptera: Cerambycidae) was studied in the Zselic region (Somogy county) in Hungary in seven consecutive years (2009-2015). In total 2931 specimens were observed and the presence of 83 species was identified during the sampling period. The most abundant species were: Plagionotus arcuatus L. (pi=10.542); Cerambyx scopoli...

According to Laznik et al. (2012), herbal oil vapours from Hippophae rhamnoides L. (Elaeagnaceae), and Calendula officinalis L. (Asteraceae) were tested for their toxicity against the adults of Sitophilus granarius (L.). The results revealed that both examined essential oils exerted strongly toxic effect on S. granarius, but C. officinalis triggere...

Damage induced on soybean by Tetranychus urticae Koch (Acari: Tetranychidae) is easily recognizable. We were curious to know whether, in addition to this visual and quantitative damage, change occurs also in the nutritional value of the harvested product. The Weendei analysis showed that as compared to the healthy items, the protein content (P=0.04...

The invasive gelechiid moth, potato tuberworm Phthorimaea operculella (Zeller, 1873) was first recorded in Hungary (Komló, Baranya County) and Northern Croatia (Lug, Osijek-Baranja County) in December 2015. This quarantine species has not been reported from Hungary so far and it was known in Croatia only from the coastal region. The occurrence of P...

Climate change has brought about an increasing level of seedcorn maggot (Delia platura Meigen, 1826) (Diptera: Anthomyiidae) damage in Hungary. In order to have a more accurate understanding of the effects of these plant injuries induced by the larvae of D. platura, the nutrient content of soybean (Glycine max L. Merill.) was studied. Our results s...

Monitoring the flight of Helicoverpa armigera (Hübner, 1805) (Lepidoptera: Noctuidae) by means of pheromone and light trapping are generally accepted and widely used methods. In the present study the catch data of 335 Hungarian light traps have been examined and compared to the field-observed results originated from light and pheromone traps in the...

Computed tomography (CT) was used to study the burrowing activity of larvae of Sitotroga cerealella Olivier, 1789 (Lepidoptera: Gelechiidae) in damaged maize grain. The randomly selected cobs were shelled and the damaged maize grains were measured. The volumes and locations of cavities formed by larvae were mapped by means of a new computer-based t...

This study aims to assess the flight period, abundance and diversity of two Cerambycid tribes (Cerambycidae: Clitini, Lepturini) in different types of habitats (urbanized, natural oak forest, herbaceous and mixed forest) of the Zselic region in Hungary. 10 Clitini and 14 Lepturini species were identified during the sampling period (2009-2015). The...

This study aims to assess the abundance and diversity of Cerambycid beetles (Coleoptera: Cerambycidae) in different types of habitats (urbanized, natural oak forest, herbaceous and mixed forest) of the Zselic region in Hungary. Beetles were collected by sweep netting and hand collecting. Species richness and diversity were analyzed for the differen...

The efficacy of X-ray radiation as a method of protection of maize grain against the granary weevil Sitophilus granarius (L.) (Coleoptera Dryophthoridae) was evaluated in laboratory tests. Irradiation was applied at five doses: 10, 50, 70, 100 and 200 Gy. After each irradiation treatment samples were divided into two parts. One group (n = 50) was l...

Agapanthia viti Rapuzzi and Sama, 2012 is a newly described Central European and North and Central Balkan faunistic element. The presence and the flight phenology of A. viti, associated with cutleaf teasel, Dipsacus laciniatus L., was studied at the Kaposvár-Toponár site (Somogy County, Hungary) during 2012-2013. According to our observation, a sta...

The laboratory examinations were carried out in the quest of the scouting of natural arthropod enemies of the common ragweed (Ambrosia artemisiifolia L.). The Curculionid ground weevils were the examined species (Tanymecus spp., Psallidium sp., Otiorchinchus spp., Bothynoderes spp., Coniocleonus spp.). The leaf destruction of Coniocleonus nigrosutu...

Az ôszi káposztarepce (Brassica napus ssp. oleifera L.) Európa legjelentôsebb és a világ egyik legfontosabb növényi olajforrása. Euró-pában vetésterülete megelôzi a napraforgóét. Világviszonylatban a 3. pozíciót foglalja el az olajpálma és a szója mögött. Termesztése más kultúrákhoz nem hason-lítható növekedést mutat, amely elsôsorban sokoldalú fel...

The invasive Cotton Bollworm (Helicoverpa armigera Hübner, Lepidoptera: Noctuidae) has become a serious pest of several agricultural plants since its first mass occurrence in Hungary (1993). During the decades of the species’ presence in the Carpathian Basin, a remarkable fluctuation was detected in its abundance and flight phenology. We analysed l...

The insecticidal efficacy of the diatomaceous earth formulation DiatoSec® (Ediafilt Diatomite Mining and Processing Ltd., Hungary) against the granary weevil, Sitophilus granarius (Coleoptera: Curculionidae), was evaluated on maize and barley grain in laboratory tests. The diatomaceous earth formulation was applied at three doses of 1, 2 and 4 g kg...

Present examination was motivated by a hailstorm, which damaged the vegetative and generative development of the maize. Although the hailstorm touched the vegetative, assimilating organs sensitively, significant changes have happened in the development of female organs, too. The developing internodia lengths of the hail stormed plants were decrease...

The study aimed to acquire the widest possible information on the flight phenology and European distribution of the four-spotted sap beetle, Glischrochilus quadrisignatus (Say) (Coleoptera Nitidulidae). The field investigations were made in 2009 and 2010 in the outskirts of Csurgó (Somogy county) in Hungary. Glass traps filled with broken maize gra...

To determine the cotton bollworm migrating population rate in Hungary, we examined the weights and the front wing morphological feautures of trapped moths. We used sex pheromone traps to monitor field populations during the maize vegetation cycle period in 2008. We examined moths trapped at various times, and measured their body mass (m) and morpho...

The cotton bollworm (Helicoverpa armigera Hübner), which migrated in the Carpathian-basin from Mediterraneum in the last decades, is becoming an increasingly serious problem for maize producers in Hungary. In several regions the damage it causes has reached the threshold of economic loss, especially in the case of the sweet maize cultivation. The a...

To determinate the pests’ damage values and their proportions in different cultivation technologies maize acreages, we examined the well seen damage illustrations of the most important phytopatogen microfungi (Fusarium spp., Ustilago maydis) and arthropod pests (Helicoverpa armigera, Ostrinia nubilalis). The investigations were carried out both in...

Healthy and Fusarium affected ears were collected in Fészerlak, Somogy County at the end of vegetation cycle of maize (25-30 August). Each pattern contains 25-25 ears. We compared the samples on the basis of visual image of Fusarium affection. The ears were shelled and two 0,5 kg samples were formed: healthy and Fusarium contaminated. After surface...

The data originating from six different points of the Hungarian Light Trap Network (1960–2005) were processed for comprehensive examination of the European corn borer's (ECB) (Ostrinia nubilalis Hübner) flight dynamics. The annual flight diagrams were visually assayed. The annual alteration tendency of the quotients of the total trapped individual...

A better understanding of the relationships between insects and microfungi could help to identify the unknown factors reducing yields in maize. As the first step in current research, the aim was to isolate the microfungal species that can be found in the larval cavity of the European corn borer ( Ostrinia nubilalis Hbn. Lepidoptera. Pyraustidae ) (...

Az elmúlt két évtizedben a kárpát-medencei kukoricakultúrákat ért „növényvédelmi csapások” jogosan kerültek a gyakorlati agrárium és egyben a tudományos kutatások érdeklődésének középpontjába. A XX. század végéig a Kárpát-medencében faunaelemként teljesen ismeretlen amerikai kukoricabogár (Diabrotica virgifera virgifera LeConte) és gyapottok-bagoly...

Healthy and Fusarium affected ears were collected in Fészerlak, Somogy County at the end of vegetation cycle of maize (25-30 August). Each pattern contains 25-25 ears. We compared the samples on the basis of visual image of Fusarium affection. The ears were shelled and two 0,5 kg samples were formed: healthy and Fusarium contaminated. After surface...

The costs of maize production became higher in the recent years, growing up with 25% in the case of monoculture in Hungary. Therefore it must be emphasised the investigation and utilisation of alternative ways for grain drying. One of these alternative technologies is the utilisation of diatomaceous earth. An incontestable advantage of this technol...

One of the most important pests of rape in early spring are weevils (Ceutorhynchus spp.). The aim of our studies was to identify the occurring weevil species and to study their emergence, swarming, mating and damage. Our observations were performed on an experimental plot at Keszthely (Hungary, Zala County) in early spring of four consecutive years...

The aim of present investigations was the increasing of knowledge of the cotton bollworm's ( Helicoverpa armigera Hbn.) (CB) damages in the different breeding season corns. The damage examinations were made in a 29.2 hectares acreage between Igal and Kazsok villages (Somogy county) on the basis of the flight observation at the end of August 2008. W...

The studies aimed to acquire the widest possible information on the annual flight in Hungary of the European corn borer (ECB), Ostrinia nubilalis Hübner (Lepidoptera: Pyralidae). The investigations used biomathematical (Part 1) and graphical (Part 2) assay to document forthcoming changes in the individual population number. The study was conducted...