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Spring insecticide treatments were evaluated in a developmental Integrated Fruit Production programme for apples in Nelson and Hawke’s Bay during the 1996-97 season. Air-blast sprayer applications of mineral oil, or oil plus either buprofezin or chlorpyrifos at ‘green-tip’, were compared for effectiveness against homopteran pests and their impact on beneficial insects. In Nelson, plots of the cultivar ‘Sturmer’ were treated with either a second application of buprofezin at ‘pink’ or chlorpyrifos in late November because of severe mealybug infestation the previous season. All treatments except oil alone gave excellent mealybug control. Buprofezin treatments provided better control of Froggatt’s apple leafhopper and had higher populations of beneficial insects than chlorpyrifos treated plots. Woolly apple aphid was present in the buprofezin plots but was contained by the parasite, Aphelinus mali.

proceedings of the new zealand weed and pest control conference/new zealand plant protection/proceedings of the ... national weeds conference/proceedings of the new zealand weed control conference/proceedings of the new zealand plant protection conference

The impact of early season insecticides in an integrated fruit production programme on apple