Effects and control of periodical cicada (Homoptera: Cicadidae) oviposition injury on nonbearing apple trees
1990
Hogmire, H.W. | Baugher, T.A. | Crim, V.L. | Walter, S.I.
Four netting and five insecticide treatments were evaluated for the protection of nonbearing apple trees from periodical cicada, Magicicada septendecim (L.), oviposition injury. A green, tubular, 1-cm-mesh netting excluded cicadas and was the most effective treatment. Netting of larger mesh sizes permitted entry and oviposition injury comparable with that observed on controls. Oxamyl, methomyl, and esfenvalerate were similar in providing excellent knockdown of cicadas; however, only treatment with esfenvalerate resulted in a significant reduction in oviposition injury. Tree height, tree volume, number of scaffold limbs per tree after pruning, and percentage of change in trunk cross-sectional area were significantly and negatively correlated with the number of oviposition scars per tree. When all costs associated with the use of insecticides for cicada control are considered, tubular netting is about 15% more expensive than chemical control with handgun sprayer at all tree densities, but cheaper than control with airblast sprayer at a tree density of 250 per ha.
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