Sobia chohan

Bahauddin Zakariya University | BZU · University College of Plant pathology

Chickpea is an important legume crop and plays a significant role in global food security. Production is affected by many biotic and abiotic factors. The most significant biotic factor, Ascochyta rabiei is a fungal pathogen that causes Ascochyta blight in chickpeas, leading to substantial yield losses globally and is the primary cause in Pakistan....

Purple blotch of onion, a significant disease impacting major onion cultivating regions globally, is often linked with Alternaria spp. In this study, symptomatic onion leaves from 11 different fields were sampled, resulting in the acquisition of 24 Alternaria isolates. Six were chosen for sequence analysis, which involved the amplification of three...

Twenty cucumber varieties were evaluated for resistance to Cucumber mosaic virus (CMV) under greenhouse and field conditions. CMV disease severity was recorded with a disease rating scale and CMV was detected with Enzyme Linked Immunosorbent Assay. The use of salicylic acid (SA) for disease management in the greenhouse and field was also evaluated....

Fig (Ficus carica) is a species of flowering plants within the mulberry family. During June 2020, leaf spots were observed on several fig plants (31°26'15.0"N 73°04'25.6"E) at the University of Agriculture, Faisalabad, Pakistan. Early symptoms were small, oval to circular, light brown, sunken spots that were uniformly distributed on the leaves. Spo...

Chickpea (Cicer arietinum L.) has played a vital role in increasing the economy of any chickpea cultivated country. Nowadays, the production of chickpea is becoming low as compared to the previous year. The main reason for this low production are environmental constraints (soil salinity, waterlogging, soil fertility depletion, soil erosion, climate...

Plant-mediated synthesis of nanoparticles exhibits great potential to minimize the generation of chemical waste through the utilization of non-toxic precursors. In this research work, we report the synthesis of magnesium oxide (MgO) and cobalt oxide (Co3O4) nanoparticles through a green approach using Manilkara zapota leaves extract, their surface...

Sunflower is an important oil seed crop of Pakistan, comprising 20% proteins and 38-45% oil contents. Alternaria leaf blight (ALB) caused by Alternaria alternata, is one of the devastating diseases of sunflower. Six different fungicides viz., difenoconazole, hexaconazole, azoxystrobin, dimethomorph + mancozeb, myclobutanil and Sulphur were tested a...

Downy mildew of cucumber caused by Pseudoperonospora cubensisis is a serious threat to the cucurbits production in high tunnels. In this study, the disease incidence and severity were recorded from nine high tunnel farms, located at Vehari District, Pakistan. The results revealed that downy mildew incidence was ranged from 24 to 80%. The disease de...

Cotton industry is an important sector of the economy in all agriculture-based countries. Nevertheless, cotton production is constantly endangered by pathogens that cause considerable economic losses. Worldwide, numerous different diseases have been identified in cotton. Fusarium and Verticillium wilt, Alternaria leaf spot and seedling diseases, bo...

Onion is widely cultivated crop and attacked by different fungi. Purple blotch of onion caused by Alternaria porri is a continuous threat to Pakistan agriculture industry for the last few years. Generally, fungicides give satisfactory control but due to the environmental concerns, their use should be restricted. In integrated disease management pro...

Fifteen Pakistan’s indigenous medicinal plant extracts were investigated for various secondary metabolites and their potential against tomato early blight disease. In vitro screening of aqueous and methanolic extracts of fresh and dry plant parts was performed against Alternaria solani at 20, 40, 60 and 80% concentrations, by mycelial inhibition me...

Rhizoctonia solani is a soil-borne fungus causing a wide range of plants diseases. Trichoderma gamsii strain T30 has previously been reported as antagonistic against R. solani. Although there are a few studies about the influence of Trichoderma strains on the R. solani densityin a pathosystem in the presence of plant hosts, this report for the firs...

Cotton (Gossypium hirsutum L.) is grown on over 2.8 million hectares in Pakistan with approximately 12.8 million bales annual production (Pakistan Economic Survey, 2013 to 2014, http://www.finance.gov.pk). During the summers of 2015, 2016, and 2017, symptoms associated with boll rot were regularly observed in cotton-growing areas in the southern Pu...

In present research assessment of disease incidence was made between Bt and Non-Bt cotton against bacterial blight disease. Experiment was carried out in natural environmental conditions on twenty eight varieties/advance lines. Findings of the experiments depicted more disease incidence on Non-Bt varieties viz., Non Bt-FH 901 (41.7-43.4%), Non Bt-M...

In present research assessment of disease incidence was made between Bt and Non-Bt cotton against bacterial blight disease. Experiment was carried out in natural environmental conditions on twenty eight varieties/advance lines. Findings of the experiments depicted more disease incidence on Non-Bt varieties viz., Non Bt-FH 901 (41.7-43.4%), Non Bt-M...

The current research was conducted to find out modification in mineral profiling of cotton after the attack of bacterial blight disease caused by Xanthomonas citri pv malvacearum. Leaves of three susceptible and resistant (un-inoculated and inoculated) cultivars were collected for the determination of alteration in ionic status. The remarkable vari...

The housefly, Musca domestica L. (Diptera: Muscidae), is a major medical and veterinary insect pest. It serves as a vector of many pathogenic microorganisms causing spoilage of food and diseases in human and animals. Use of chemical insecticides is adapted as a principal tool to manage housefly. Insecticides have many unforeseen ecological conseque...

Housefly (Musca domestica L.) contaminates food by transferring microbes. Fungi carried by houseflies cause postharvest losses by food spoilage produce mycotoxins and spread various infectious diseases in human beings and animals. This study was planned to determine the diversity and frequency of fungal species carried by houseflies and their relat...

Cellulase is the most important enzyme in the world enzyme market, which can be synthesized by growing fungi on lignocellulosic substrates. In this study, cellulase was produced by using Trichoderma species. Twenty-three Trichoderma species were isolated and screened out for their cellulase-producing ability. Selected species, Trichoderma reesei, w...

Tomato (Solanum lycopersicum L.) is an important food crop extensively grown all over the world and is susceptible to various abiotic and biotic stresses. Tomato leaf curl virus (TLCV) is a devastating disease of tomato, transmitted by whitefly, ultimately results in marked reduction of tomato production. In current experiment, four tomato cultivar...

A survey was conducted for bacterial black spot disease in different districts of Punjab. Maximum disease incidence was observed in Multan followed by Muzaffar Garh and Khanewal while minimum disease incidence was noted in Jhang and Lodhran district of the Punjab. Thirty symptomatic samples were collected from multiple locations and associated path...

Bitter gourd is of great importance due to its usage against the treatment of numerous ailments in human beings. A comprehensive survey at four localities of Southern Punjab, Pakistan was carried out to determine the severity of Myrothecium leaf spot. Maximum disease severity was at C 1 (Chak 11/NP) and least at C 2 (Kot Mehtab). Among isolated spe...

Plant diseases caused by different kinds of microorganisms either carried through air, water or present in soil, seeds or propagative planting materials have adverse impact on agriculture production and economy worldwide. Apart from other crops vegetables are also subjected to several seed borne fungal, bacterial and viral pathogens, which cause su...

Bacterial leaf Blight of cotton a major seed borne foliar disease that attacks the crop at all growth stages leading to cause severe losses in conducive environment. To find out best source of resistance against pathogen this research was conducted in the field area Department of Plant Pathology, University of Agriculture Faisalabad. Incidence of b...

Antifungal activities of medicinal plants were observed against seedborne mycoflora of eggplant (Solanum melongena). The effect of ethanolic leaf extracts of Mangifera indica, Mentha spicata, Citrus limon, Eucalyptus camaldulensis against four isolated fungal species including Fusarium oxysporum, Aspergillus flavus, Rhizopus stolonifer and Penicill...

The study was conducted in the Department of Plant pathology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan during the year 2012-2015. Stepwise regression model was developed for the devastating pathosystem; bacterial leaf blight of rice caused by Xanthomonas oryzae pv. Oryzae. Three highly suscept...

In vitro studies were carried out for the isolation, identification, biochemical, cultural and physiological characterization of Xanthomonas oryzae pv. oryzae. Biochemical and diagnostic tests proved X. oryzae pv. oryzae as a gram negative bacterium that showed luxurious growth on a new modified yeast sucrose calcium carbonate nutrient agar (YSCNA)...

Fungal pathogens are serious problems on tomato plants. Among them, Fusarium oxysporum f. sp. lycopersici and F. solani, causal agents of wilt and root rot, respectively, affect tomato production under greenhouse and field conditions. Aqueous extracts of three plant rhizomes viz., Curcuma longa Val., Allium sativum L. and Zingiber officinale Rosc....

Bacterial leaf blight of rice caused by Xanthomonas oryzae pv. oryzae, arguably is the most important disease of rice (Oryza sativa L.) worldwide due to its growing concern, wide spread and destructive nature and lack of understanding its control. The present study was carried out for screening of rice germplasm against X. oryzae pv. oryzae and det...

Early blight (Alternaria solani) is a potential disease of tomato that reduces its production globally both in conventional and tunnel cultivations. Due to variability in pathogenic isolates, prolonged active disease cycle phase and broad host range early blight is very difficult to manage. A. solani isolate collected from tunnel grown under vegeta...

Black scurf disease of potato, caused by fungus Rhizoctonia solani, is the most common and one of the oldest diseases of potato affecting stem and stolons. In recent years, the disease is reportedly present in the fields of potato in Pakistan especially in Punjab. Survey of different locations viz. Narangaabad, Band Bosan, Kaian Pur, Kotla Abdul-Fa...

In the present scenario, Pakistani mango is facing serious apprehension about production decline and export, consequently present study was planned to categorize the paramount mango (Mangifera indica L.) cultivar in relation to its physical, chemical and sensorial attributes. Physiologically fully mature fruits of eight mango cultivars were picked...

In the present scenario, Pakistani mango is facing serious apprehension about production decline and export, consequently present study was planned to categorize the paramount mango (Mangifera indica L.) cultivar in relation to its physical, chemical and sensorial attributes. Physiologically fully mature fruits of eight mango cultivars were picked...

Fungi toxic effects of five medicinal plants namely, Azadirachta indica, Ocimum basilicum, Datura stramonium, Tagetes erecta and Allium sativum were tested at 2, 4, 6 and 8% concentration against Fusarium oxysporum f. sp. gladioli in vitro. Out of five medicinal plants, extract of A. indica showed maximum mycelial growth inhibition both at 8% conce...

Study of seed borne fungi associated with bitter gourd seeds were conducted under in vitro condition in Department of Plant Pathology, Bahauddin Zakariya University, Multan, Pakistan. Two hundred (200) seed samples of Momordica charantia (bitter gourd) were collected from southern regions of Punjab province (Multan, Khanewal and Bahawalpur). Six fu...

The Correlation investigation has been developed between the Cotton leaf curl virus (CLCuV) disease severity on 64 cotton varieties/strain and environmental factors like maximum and minimum temperatures, rainfall, relative humidity, wind velocity and sunshine hours separately to find out the most crucial environmental factor for disease development...

The present study was conducted to check the effectiveness of organic supplements on pathogenic potential and population density of Phytophthora capsici. Effective use of different carbon, nitrogen sources and organic supplements against mycelial growth and sporangial production of fungus Phytophthora capsici were carried out In vitro. The amount o...

Triple antibody sandwich Elisa (TAS-ELISA), infectivity test verified the existence of begomovirus in six weeds i.e. aksan, hulhul, lehli, itsit, bhakra and tandla with mean value 0.6400μl, 0.1200μl, 0.1500μl. 0.1200μl, 0.4600 μl and 0.1900μl respectively. TAS-ELISA too authenticated the occurrence of begomovirus in shoe flower, okra, brinjal and c...

Whitefly population was high with mean value 9.25 in 1999 as compared to mean value 5.57 during 2000. Out of 64 cotton varieties infested with whitefly population, 51 exhibited economic threshold level (five nymphs and or adults per leaf) in 1999 but 38 varieties were found in 2000.Peak population was observed at the end of growing season i.e. betw...

Three commercial pea varieties were studied for the presence of seed associated fungi and their impact on germination percentage of peas. Seed samples were also treated with Chlorox (1%), hot water (52°C for 12-13 min), fungicide (Vitvax @ 1 g kg-1) to study their efficacy. Out of the 12 fungi isolated from pea seed samples, Alternaria sp., Fusariu...

Studies on pathogenicity and some of the physiological aspects of the fungus Phytophthora incotianae var. parasitica were carried out. It produced typical symptoms of disease after 20 days of inoculation. A temp of 25°C, pH of 6 and continuous light was found to be the optimum for its growth after 72 hours of incubation.