Bioefficacy of pesticides against green apple aphid Aphis pomi de geer and biosafety to natural enemies in apple orchards Khan Akhtar Ali*, Riyaz Shazia Division of Entomology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Shalimar, Srinagar-190025 *Email: akhtaralikhan47@rediffmail.com
Online published on 27 July, 2018. Abstract Field experiments were carried out to evaluate the bioefficacy of pesticides against green apple aphid (Aphis pomi) and biosafety to their natural enemies during 2014. Three pesticides viz., imidacloprid (17.8SL) @0.17, 0.28, and 0.58ml/L. dimethoate 30EC @1.0, 1.5 and 2.0ml/L; thioclopid (21.7SC) @0.1ml, 0.2ml and 0.4ml/L; cypermethrin (25EC) @1.0, 1.5, and 2.0ml/L; chlorpyriphos (20EC) @1ml, 1.5ml and 2 ml/L of water were compared with the treated check (dichlorvas 76 EC) @ 1ml/l of water, along with untreated control. Imidacloprid 17.8SL @0.28ml/L was the most effective with highest reduction in aphid incidence (87.16%) and natural enemies showing 62.85% change, and caused less effect of parasitisation. Thus it has only slight harmful insecticidal effect on the non target organisms (as per the recommendations of International Organisation of Biological Control) as compared to other evaluated pesticides. Thus, it can be considered as a potential pesticide for the management of green apple aphid in apple orchards. Top Keywords Apple orchard, Aphis pomi, insecticides, bioefficacy, biosafety, imidachloprid, non target effect, coccinellids, syrphid, Chrysoperla. Top |