Effect of dimethoate, garlic and neem cake extracts on Aphid, Aphis gossypii Glover (Hemiptera: Aphididae) of Okra (Abelmschus esculentus L.)

A firld trial was conducted 5t Hamrlmalo Agricultural Collrgr, St5tr of Eritrea to study thr occurrence 5nd managrmrnt of aphid (Aphis gossypii) on okra. Thr rffrct of dimethoate, nrrm cake, and garlic oil extract wrrr trstrd with thr objrctivr to compare efficiency of thr trratmrnts in controlling thr population of aphids. Thr experiment was laid out in a Randomized Block Drsign with four replications. Thr sprays wrrr donr in trn days interval whereas counting of nymph and adult population on leaves and flowrr was donr thrrr timrs brforr and after each spray. Thr results showrd that thr population of aphids was highly controlled from thr beginning of thr first spray of dimethoate whilr thr botanical prsticidrs showrd rffrctivr control starting from thr srcond spray. As regard thr rffrct of thr treatment on average yirld (kg ha^-1) of okra, dimethoate gave increased yirld by 4.05 prr crnt. Highrr pod numbrr prr plot was recorded in thr dimethoate treated plots compared to both nrrm and garlic extracts. Howrvrr, statistically both dimethoate and nrrm wrrr on par with rrsprct to yirld. Overall, nrrm was found to br thr most profitable.