Effectiveness of Insecticides and Biopesticides against White backed Plant Hopper (original) (raw)
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Efficacy of botanical pesticides against white backed plant hopper in rice
Journal of Crop and Weed, 2011
A jie!d tnal 11•as conducted during Khan/ season. 2004. repeated 111 Rah1 season. 2004-05 and Khar/lseason. 2005 at the Regional Research and Technology Trnnsfer Station (RRTTS}, Keonjhar. OUAT Bhubanesirnr. !he pelfor111ances of the neem derivatil'Cs like neem seed extract (NSE). neem oil (.\D), Mul/11neem (commercial product ol neem based pesticide) and a commercial B.t. lormulation (Hall) were evaluated for their bioe_{ficacy against irhite backed plant hopper. Populations of WBPH \l'ere recorded at 3(J and 50 DAT Results indicated that jirst round applica/lon ll'ith neem pesticides al 21) DAT and subsequent application ll'ith the same neem pesticides or with chemical pesticide like chloqJyriphos at 40 DAT could be the appropriate step to handle !he WBPH population in rice crop.
Evaluation of new insecticides against rice brown plant hopper
Indian journal of entomology, 2018
Evaluation of six insecticides viz., ethiprole 40 + imidacloprid 40 WG, etofenprox 10 EC, buprofezin 25 SC, pymetrozine 50 WG, acephate 75 SP and monocrotophos 36 SL were evaluated against rice brown plant hopper BPH. The BPH population was counted on 20 randomly selected hills before spray at 1, 3, 7 and 10 days after spray. The experiment was conducted during kharif 2014 and 2015 at the Agricultural Research Station, Kampasagar, laid out in Randomized Block Design with three replications. All the insecticides significantly reduced the BPH. The BPH population varied from 114.0 to 156.6 and 133.4 to 176.6/20 hills during kharif 2014 and 2015 at one day prior to spray. The population was significantly lower with pymetrozine 50 WG @ 250 g/ha, followed by ethiprole 40 + imidacloprid 40 W.G @ 125 g/ha, etofenprox 10 EC @ 750 ml/ha, acephate 75 SP @ 667g/ha, monocrotophos 36 SL @ 1390 ml/ha and buprofezin 25 SC @ 825 ml/ha at all the counting days of after spray in both 2014 and 2015. Th...
2014
Field experiments were conducted in farmer's rice fields at village Saholi, Punjab, India during 2012 and 2013 to test the efficacy of different plant based biopesticides and microbials against insect pests of aromatic rice ( Pusa 1121 and Basmati 386) grown under organic farming system. In all, five biopesticide formulations (2 plant based; 3 microbials) were tested for their efficacy. Neem azal 1% @ 1250 ml/ha showed its supermacy in reducing the incidence of leaf folder (0.97-5.66% DL), dead hearts (0.98-1.67% DH), white ear heads (1.07-2.05%), plant hopper(s) population (0.11-0.40/plant) and resulted in higher grain yields (25.54-36.47 q/ha) compared with ohter treatments. Similarly, the application of Neem azal 1% @ 1000, Dipel WP @ 2.0 kg/ha, Karanja oil 2.0% and Myco-Jaal 10% SC @ 2.0 litre per ha significantly reduced the incidence of leaf folder, dead hearts and white earheads increased grain yields in comparison to untreated control. Microbials, by large, were ineffect...
An ecofriendly alternative to chemical pesticides is biopesticides, which encompasses a broad array of microbial pesticides, biochemicals derived from micro-organisms and other natural sources, and processes involving the genetic incorporation of DNA into agricultural commodities that confer protection against pest damage.The field studies were carried out for effectiveness of insecticides and biopesticides against gundhi bug on rice in rewa region. Study of insect pest complex was done from 2006-07 to 2007- 08. The observations were made regarding the grain yield monocrotophos was the most efficient insecticide where as among biopescides wanis was the best.
Journal of entomology and zoology studies, 2018
An experiment was conducted during Kharif season in 2016 at the Central Research Farm, SHUATS, Naini, Allahabad to observe the three applications of seven insecticides viz Imidacloprid 17.8% SL, Trizophos 25% SP, Monocrotophos 36% SL, Thiamethoxam 25% WG, Acephate 75% SP, Carbaryl 50% SP, Malathion 50% EC on natural enemies of insect pests in rice field under agro-climatic condition of Allahabad. Results were revealed that all the treatments were effective significantly to suppress the population of Coccinellids as compared with control (1.36 Coccinellids/hill). The treatment Monocrotophos was recorded lowest population of Coccinellids with (0.54 Coccinellids/hill) and found to be superior among all other treatments. This was followed by Triazophos (0.65Coccinellids /hill), Carbaryl (0.76Coccinellids /hill), Thimethoxam (0.83Coccinellids/hill), Malathion (0.87Coccinellids /hill), Imidacloprid (0.91Coccinellids/hill), Acephate (1.07Coccinellids/hill) respectively.
Effectiveness of biopesticides against brown planthopper ( Nilaparvata lugens ) in paddy cultivation
Sustainable Chemistry and Pharmacy, 2018
The brown planthopper (BPH) causes serious damage to rice by sucking rice sap, ovipositing in rice tissues, and transmitting a number of rice diseases during its long-distance migration that severely affect the productivity of paddy. Thus, the aim of this study is to investigate the effectiveness of biopesticides against BPH population. BV500WS is used at the early stage of paddy cultivation for growth enhancement meanwhile BV612EC is used a week after the liberation of BPH for crop protection. Three conditions were adopted as follows which are T1 where the paddy was sprayed using BV500WS and BV612EC to study the effectiveness of both types of biopesticides, T2 where the paddy was sprayed using BV500WS only and C1 where the paddy was cultivated without any pesticide application as control. BPH was released twice on day 46 and 59 of paddy cultivation. Reduction of BPH population with up to 100% mortality rate was observed with the application of two types of biopesticides at T1 resulting in the highest number of remaining tillers with 68.56%. Although severely affected by BPH, T2 was able to has comparable number of remaining tillers as C1 which was 46.24% and 49.65% respectively. These results showed that two types of biopesticides were more effective in reducing BPH compared to one type of biopesticide.
International Journal of Pure & Applied Bioscience, 2017
against Yellow Stem Borer (Scirpophaga incertulas Walker) under kharif Rice-Crop-Ecosystem of Manipur valley. Among the various ecofriendly insecticides field evaluated against the Lepidoterous pest, (Acephate 50% + Imidacloprid 1.8) 51.8 SP@750 g a.i. ha-1 (2.11% DH) was found most effective against the yellow stem borer with a record of lowest Dead Heart damage.The maximum dead heart percent was recorded in plots treated with EMFPE @ 2500 ml/ha(3.92% DH).The pooled mean data further indicated that (Acephate 50% +Imidacloprid 1.8) 51.8 SP@750 g a.i. ha-1 proved to be the most effective insecticidal treatments in reducing white ear head (WEH) incidence with a record of 1.61% WEH as against 2.23% in untreated control.
Bioefficacy of crude polyherbal formulations against hoppers (Insecta: Hemiptera) of rice
Journal of Entomology and Zoology Studies, 2020
Bio-efficacy of two crude polyherbal formulations against Nephotettix virescens-the Green Leafhopper (GLH) and Sogatella furcifera, the White-backed plant hopper (WBPH), major sucking insect pests of paddy was carried out at farmer's field of North Gujarat Zone (GJ-4), Gandhinagar, Gujarat during Kharif 2018. The aqueous and oil-based crude formulations were tested at two different concentrations each, in comparison with chemical, botanical and untreated control. Both the crude formulations were effective in the management of green leafhopper and white backed plant hopper in a dose-dependent manner, however, the aqueous formulation was more efficacious as compared to the oil-based formulation. These herbal formulations are an eco-friendly, cost-effective and safe alternative to chemical control measures for the management of paddy pests and can easily be incorporated in the integrated pest management (IPM) programs for the control of sucking pests in Paddy.
2018
A field study in the experimental area of Entomology Section, Agriculture Research Institute, (ARI) Tandojam Sindh Pakistan was carried out so as to examine the efficacy of different biopesticides against the cauliflower white fly. Seven treatments with three replications that: T1=chemical control (confidor), T2=Neem (Azadirachta indica), T3=Akk (Calotropis procera Alton. F.), T4=Tooh (Citrullus colocynthus Schrad. L.), T5=Datura (Datura stramonium) T6=Tabacco (Nicotiana tabacum) and T7=Control (untreated) were applied and white fly infesting in cauliflower plant was found. In this regard, the pre and post-treatment observations were also recorded. Against whitefly, chemical control (confidor) showed highest efficacy (95.75%) as observed during 1 st spray, followed chemical control (confidor) (91.89%), Tooh extract (83.81%) and least efficacy for Dhatura extract (78.14%); while after second spray also, chemical control (confidor) showed highest efficacy (86.36%), followed by Neem extract (73.58%), Tobacco extract (75.11%), Tooh extract (70.67%), Akk extract (70.05%) and the lowest efficacy was resulted by Dhatura extract (66.63%). According to the overall efficacy of biopesticides against whitefly after first and second spray, the treatments ranked as: chemical control (confidor), neem extract, tobacco extract, tooh extract, akk extract and dhatura extract respectively
Compatibility of insecticides and fungicides against major insect pests and diseases of rice
International journal of tropical agriculture, 2014
Nesidiocoris tenuis (Reuter) (Hemiptera: Miridae) is an effective predator of multiple pests of vegetable crops, such as thrips, mites, aphids, whiteflies, leafminers. It is mass-reared and released for augmentative biocontrol programs mainly aimed at controlling whiteflies and Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) in greenhouses and open field. We evaluated the lethal and sublethal toxicity upon N. tenuis adults of label doses of three insecticides (pyriproxyfen, spirotetramat, cypermethrin) and seven fungicides (benomyl, chlorothalonil, copper oxychloride, cyazofamid, fluopicolide + propamocarb hydrochloride (FPH), penconazol, trifloxystrobin) commonly used in various crops. Two exposure routes were tested: (i) contact with dry residues of insecticides or fungicides on tomato sprouts and (ii) multiple exposure to these chemicals via topical sprays on adults which foraged on treated sprouts; and fed on treated eggs of Ephestia kuehniella (Zeller) (Lepidoptera: Pyralidae) simultaneously. Mortality and reproductive capacity were investigated as indicators of lethal and sublethal effects on N. tenius. The tested insecticides and fungicides were all classified as harmless when predator was exposed only to the dry residues of each. However, the multiple exposure to either cypermethrin, benomyl, chlorothalonil, copper oxychloride or trifloxystrobin caused significant mortality of N. tenuis adults. Cypermethrin also significantly reduced its reproductive capacity. Interestingly, N. tenuis produced a higher number of progeny when exposed to fungicides penconazol and FPH in both exposure scenarios. Overall, findings suggest that the two insecticides, pyriproxyfen and spirotetramat but not cypermethrin, and all tested fungicides can be considered compatible with N. tenuis.