Field effecacy of newer molecules on sap feeders of green gram Vigna radiata (L.) Wilzeck Mishra Ipsita O.P.*, Mukherjee S.K. Department of Entomology, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar-751 003, Odisha, India *E-mail: ipsita.mishra0001@gmail.com
Online published on 30 November, 2019. Abstract A field experiment was conducted to study the effect of newer molecules on sucking pest complex of green gram viz., white fly (Bemisia tabaci), thrips (Megaleurothrips distalis) and aphids (Aphis craccivora). All the three sap feeders (thrips, aphids & whitefly) were found attacking greengram crop from 2nd week of January and attainted their peak, i.e., 7, 6 and 26 (nos. plant−1) at 60, 63 and 68 DAS. Amongst six newer molecules tested, thiomethoxam, emmamectin benzoate and cyazypyr were most promising against thrips (1.0–2.0 plant−1) followed by spinosad and cartap hydrochloride (5.0–7.0 plant−1) as against 18.30 plant−1 in untreated control. Aphids though appeared for a short period had a distinctly lower built up in cyazypyr (1.33 plants−1) followed by emmamectin benzoate and thiamethoxam (3.00–3.33 plant−1) as compared to 25.23 plant−1 in untreated control. All the new molecules had a marked variation against whitefly and most effective molecule was thiamethoxam (2.98 plant−1) followed by cyazypyr (5.29 plant−1), while it was 27.23 plant−1 in untreated control. Top Keywords Sap feeders, new molecules, green gram, efficacy. Top |