Abstract
A field study was conducted to assess the effectiveness of six insecticides (with different modes of action) viz, imidacloprid, spirotetramat, sulfoxaflor, buprofezin, pyriproxyfen, and mineral oil, against the olive psyllid Euphyllura straminea (Loginova) (Homoptera: Aphalaridae) on olive trees (Olea europea L.) in Giza Governorate during the 2022 season. The results indicated that all tested insecticidesa significantly reduced the olive psyllids (both nymph and adult stages). Particularly, imidacloprid, sulfoxaflor, and spirotetramat were superior in reducing nymphs (91.37, 89.80, and 89.34% reduction, respectively). Mineral oil was the least effective (only 81.39% reduction). The same order of efficiency was observed with the adults, except for spirotetramat. Buprofezin and pyriproxyfen as insect growth regulators (IGR) displayed good efficacy.
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