Further Tests of Dichloroethyl Ether and of Jarring to Control Plum Curculio

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Abstract
Expts. conducted in the laboratory and on caged peach trees show that dichloroethyl ether is very effective against the plum curculio (Conotrachelus nenuphar) in the soil. In expts. conducted in a commercial peach orchard, 2 applications of dichloroethyl ether on the soil under the spread of the trees, plus 12 jarrings, gave as good control of the plum curculio as the regular schedule of Pb arsenate sprays on the fruit. No injury to vegetation under the spread of the peach trees or to any part of the trees or foliage could be discerned from the 2 applications of dichloroethyl ether on the soil, whereas the trees that had received the regular schedule of Pb arsenate were 90-95% defoliated on Sept. 12, following an especially favorable season for arsenical injury.

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