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Efficacy of different eco-friendly modules against mango leafhoppers
Abstract and Figures
Application of Buprofezin 25 SC @ 1.25 ml/l was the most effective in reduction of leafhopper population followed by combined application of Yellow sticky tarp (YST) @ 2 traps/tree + azadirachtin 10,000 ppm @ 1 ml/l - Lecancillium lecanii @ 2 g/l) - azadirachtin@ 1 ml/l. Application of Buprofezin 25 SC @ 1.25 ml/l produced significantly highest yield of 29.96 q/ha. It was attributed to higher number of fruits plant⁻¹ (151 fruits), fruit weight (161.33 g fruit⁻¹) and fruit yield per plant (24.36 kg) which was traced back to higher suppression of leafhoppers.
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... The results of the present study are parallel to that of Sharanabasappa et al. [32] reported dinotefuron 20 SG @ 0.3 g l -1 as the best treatment which recorded a significantly lowest number of nymphs and adults of mango leafhoppers, followed by imidacloprid 70 WG @ 0.25 g l -1 , buprofezin 25 SC @ 2 ml l -1 , thiamethoxam 25 WG @ 0.24 g l -1 , and imdidacloprid 17.8 SL @ 0.5 ml l -1 . Efficacy of Buprofezin was also reported by Manjunatha et al. (2017) who revealed that application of Buprofezin 25 SC @ 1.25 ml l -1 was the most effective in reduction of population of mango leafhopper followed by combined application of Yellow sticky tarp (YST) @ 2 traps per tree + azadirachtin 10,000 ppm @ 1 ml l -1 -Lecancillium lecanii @ 2 g l -1 -azadirachtin@ 1 ml l -1 . Chaudhary et al. [27] reported that imidacloprid 17.8 SL @ 0.4 ml l -1 , thiomethoxam 25 WG @ 0.1 g l -1 and acephate 75 SP @ 1 g l -1 95.35, 93.99 and 73.66 per cent mean mortality of mango leafhoppers after the second spray, respectively. ...
An experiment was conducted to evaluate the efficacy of nine insecticides viz., Dinotefuron 20 SG @ 0.3 g l-1 , Buprofezin (15%) + Acephate (35%) WP @ 2.5 g l-1 , Flonicamid 50 WG @ 0.4 g l-1 , Imidacloprid (40%) + Ethiprole (40%) 80 WG @ 0.6 g l-1 , Lambda Cyhalothrin 5 EC @ 2.0 ml l-1 , Spinosad 480 SC @ 0.3 ml l-1 , Thiamethoxam (12.6%) + Lambda Cyhalothrin (9.5%) 247 ZC @ 1.0 ml l-1 , Pymetrozine 50 WG @ 0.6 g l-1 , Imidacloprid 17.8 SL @ 0.3 ml l-1 along with an untreated control. Pooled efficacies of these treatments revealed that Imidacloprid (40%) + Ethiprole (40%) 80 WG @ 0.6 g l-1 and Thiamethoxam (12.6%) + Lambda Cyhalothrin (9.5%) 247 ZC @ 1.0 ml l-1 have resulted in 95.68 and 94.88 per cent reduction of leafhopper population over control (ROC), respectively and were proved to be the most effective treatments followed by Buprofezin (15%) + Acephate (35%) WP @ 2.5 g l-1 (92.54 % ROC). The descending order of efficacy was Pymetrozine 50 WG @ 0.6 g l-1 (84.81 % ROC), Imidacloprid 17.8 SL @ 0.3 ml l-1 (77.45 % ROC), Lambda Cyhalothrin 5 EC @ 2.0 ml l-1 (73.65 % ROC), Flonicamid 50 WG @ 0.4 g l-1 (69.83 % ROC) and Dinotefuron 20 SG @ 0.3 g l-1 (68.10 % ROC) where the latter two were at par with each other. The least per cent reduction of leafhoppers (53.85 % ROC) over control was recorded with Spinosad 480 SC @ 0.3 ml l-1 .
... Poornima et al. (2018) [5] reported that thiamethoxam 25 WG @ 0.3 g/L was found the most significant in suppressing the hopper population (1.15/inflorescence) after 14 days of the third spray, while lambda-cyhalothrin 5 EC @ 0.5 ml/L and imidacloprid 17.8 SL @ 0.25 m/L were next best treatments (4.75 and 5.58/inflorescence). Buprofezin 25 SC @ 1.25 ml/L was found to be the most effective in reducing the population of mango hopper (Manjunath et al., 2017) [3] . Chaudhari et al. ...
A field experiment was conducted at Anand Agricultural University, Anand during Rabi season 2019-20 to assess the bio-efficacy of various insecticides against aphids infesting coriander. Of the nine evaluated insecticides tolfenpyrad 15 EC, flonicamid 50 WG and afidopyropen 5 DC were found the most effective in reducing the incidence of aphids infesting corinader. However, thimethoxam 25 WG, flupyradifurone 200 SL, dinotefuran 20 SG and sulfloxaflor 21.8 SC were found moderate in their effectiveness. Maximum coriander seed yield was recorded from the plots treated with tolfenpyrad 15 EC (1441 kg/ha) which was at par with flonicamid 50 WG (1400 kg/ha) and afidopyropen 5 DC (1391 kg/ha).
Mango, fulangi/'era indica L., a member of family Anacardiaceae, is an important ol'the commercial fruit [topical and subtropical regions of the world.'l'he crop.urr.it regularly to a colossal loss due to ravages of pests, which is considered to be a serious threat to Mango industry. rhe most destructive insects are the_mango hoppers which cause greatest damages to the mango inflorescences in lndia and Banglidestr.'ihe present investigition was undertaken with a new insect growtlt regulator (lGR) Buprofezin 25 sc (Buprostar), a'candidate product r.orn N,|"ghmurl organics Lirnited (MoL), Ahmedabad, lndia for conirot "";;rgo;;p Lelh' pers (Amritodous atkinsoni and ldioscctpu.s niveosparsus Leth.), the predominunt ,p"ii", in *ungo orchards oi w"rt Bengal, lndia. Imidachloprid 17.8 sL (0.0053o/0) and profenopt,os !o % EC (0.07502) were used as check' During the month of Februaryhopper population on attaining 5 adults /10 nymphs per panicle were given 2 sprays at a fortnighify inteivat. observation on mango hopper, natural encn;iesandphytotoxicitytvererecordedonedaybeforesprayand l,Tandl4daysafterthespray
utrder the present investigation. lmidactoprid 17.8% pL treatment resulted in theiest ,rppi"rrion ol lropper pc':ttlation-(9^lj8? 7o suppiession) over untreated control, closely followed by lltoGnophos 5i; o/o EC.(88.51 7o suppression) and Buprofezin 25%o sC (Buprostar) (g5.22o/o suppression). lluprostar increased in tlie natural enemies' poprruiion in ranging from 3.g5 to 7.g5 and is sirlilar to trtttreated control (4.26 to 7.06), indicating nufiorezin 25SC safe to natural enemies. whereas, Imidachloprid 17.8 SL and Proienophos so"z EC ;;;;r* ,. iteiryir-t" to natural enemies ol'rnango. Buprostar (Buprofezin) 25 SC at 0..}Syogave more tbat glo/ocontrol
of mango lropper and is safer to natural enemies of mango uoJ nu. no adverse effect on mango leaves, flora'ers and fruits. considering the moderate to t i!rr". to nalural enemies and minimum impact on human healthl cou"prlerid; Aw it*h hwlgehlle ra sy iit.srJ l opwo tt"onxiiicairtyy insect grorvth regttlaitlrs (lcR) can bi incorporated in future IpM programme and organic farming irr fi'rrit cultivalion. - - r--o'
l(e5' rvords : Pesticides, pest
The mango leafhopPers, Amritodus atkinsoni (l..eth),/dioscopus dypealls (Leth.) and I. nlveosparasus (nitidulus) (Leth.) are serious pests of mango at the Dowering and fruiting stages. Biology, seasonal abundance, sex ratio and population dynamics of mango hoppers has been studied by various workers. The concept of sampling, economic threshold, cultural practices and insecticidal sprays must be adapted to workout the need-based· and judicious use of insecticides that will facilitate the (PM programme on mango.
The mango leafhopper, Idioscopus nitidulus (Walker), is one of the most serious mango insect pests in the Oriental region. It was first detected in Darwin in the Northern Territory in 1997, and it has been one of the major mango insect pests since 1998. Successful control can be achieved by conventional growers with regular sprays of chemical insecticides, but no suitable control methods are available for organic growers. Weaver ants, Oecophylla smaragdina (Fabricius), have been used to control the main insect pests in cashew orchards since 1998. Three series of field experiments and five field surveys were conducted from 2001 to 2003 in the Darwin area to evaluate whether weaver ants, which are usually abundant in non-sprayed mango orchards, have the potential to control the mango leafhopper. In the field experiments, an average 3.2% of floral shoots and 10.9% of foliar shoots were damaged in the weaver ant treatment, which was similar to or better than in the insecticide treatment (6.7% of floral shoots and 29.9% of foliar shoots damaged). In the treatment without weaver ants or insecticides, the average damage was 30% for floral shoots and 53.4% for foliar shoots. In the field surveys, an average of 4.4% floral shoots were damaged on trees with abundant weaver ants, while 17.5% were damaged on trees with fewer weaver ants and 18.6% on trees with other ant species or no ants. This work indicates that weaver ants are efficient biocontrol agents of the mango leafhopper, and that it is important to maintain the ants at high levels for successful control of the leafhopper. Various aspects of using weaver ants in mango orchards are discussed.
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