International Journal of Plant Protection

Rashmi Gauraha ¹, Sanjay Sharma ²

Affiliations
1 C.G. State Department of Agriculture, Raipur C.G., IN
2 Department of Extension, Indira Gandhi Krishi Vishwavidyalaya, Raipur C.G., IN

Abstract

Cauliflower crop suffers heavy damage caused by numerous insect pests such as crucifer Leaf webber, leaf caterpillar, diamondback moth, borer, semi-looper, flea beetle and tobacco caterpillar etc., which are of economic concern. Among these, DBM is the most serious pest of the cauliflower and cabbage in this area and in most parts of the world. This insect is known to vary to a great extent in respect of habitat and mode of feeding. Hence, the selection of an insecticide and mode of their application to control DBM larvae on different host crops also vary. Efficaey of various chemicals in controlling DBM on different host crops has been widely discussed by many workers in the past. The synthetic chemicals that were initially effective against DBM were found to fail after few continuous applications. Indiscriminate use of every synthetic insecticide for controlling DBM has led to development of resistance in this pest. It is because of this, it built physiological dominance of detoxifying the xenobiotics and the DBM has attained worldwide importance. Therefore, judicious use of these promising bio-rational insecticides as a component of DBM management strategy on various host crops will be of paramount significance.

Keywords

Bioecology, Management, Diamond Back Moth Plutella Xylostella

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Randeep Kumar Kushwaha ¹, Vijay Kumar Koshta ¹, Sanjay Sharma ¹

Affiliations
1 Department of Entomology, Indira Gandhi Agriculture University, Raipur (C.G.), IN

Abstract

Comparative bioefficacy of few newer insecticides were tested against brown planthopper of rice under greenhouse conditions, IGKV, Raipur during 2013 and 2014. The mean of cumulative mortality during first year clearly indicated that all the insecticidal treatments were significantly superior over untreated control within ten DAT. The highest cumulative mortality (100.00%) of BPH was observed in bifenthrin 10 EC and chlorpyriphos 50 EC + cypermethrin 5 EC. It was followed by fipronil of (98.00%) and minimum (44.00%) in indoxacarb 14.5 SC whereas, during second year, all the insecticidal treatments were also significantly superior over untreated control within ten DAT and similar trend of the maximum cumulative mortality of BPH was noticed in bifenthrin 10 EC and chlorpyriphos 50 EC + cypermethrin 5 EC followed by fipronil of (96.00%) with the minimum (50.00%) in indoxacarb 14.5 SC. On the basis of overall compared the efficacy of different tested insecticides against BPH population of two years mean, revealed bifenthrin 10 EC chlorpyriphos 50 EC + cypermethrin 5 EC to be highly effective (100.00%) with quick knock down effect in controlling BPH whereas, fipronil 5 SC and monocrotophos 36 SL were also effective but it tooks time for getting (97.00%) and (77.00%) control. Descending order of mortality of BPH was observed with different insecticidal treatments as bifenthrin (T₄) < chlorpyriphos + cypermethrin (T₆) <fipronil (T₃) < monocrotophos (T₁) < imidacloprid (T₂) < indoxacarb (T₅) on the basis of all the observations.

Keywords

BPH, Nilaparvata lugens, Comparative Bioefficacy of Newer Insecticides, Insecticides Evaluation.

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Randeep Kumar Kushwaha ¹, Sanjay Sharma ¹, Padmesh Kundan Sharma ¹

Affiliations
1 Department of Entomology, Indira Gandhi Agriculture University, Raipur (C.G.), IN

Abstract

Determination of Economic Threshold Level (ETL) was carried out at glass house of Entomology Dept., Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh during 2012 and 2013. The five to ten BPH nymphs/hill attacked at seedling, fifteen to twenty at tillering and twenty to twenty five at booting stage can cause yellowing in lower leaves then wilting and death in the varieties TN-1, Swarna, Karma mahsuri and Mahamaya. However, the variety Ptb-33 is not affected because of its high level of resistance to BPH but Karma mahsuri was moderately susceptible as compared to TN- 1 but variety Mahamaya and Swarna noticed high level of susceptibility. Descending order of BPH infestations observed with the different varieties can be ranked as TN-1 < Swarna < Mahamaya < Karma masuri < ptb-33 within seven day after nymph release.

Keywords

BPH, Nilaparvata lugens Stal., Determination of Economic Threshold Level, Different Stages of Rice.

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