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- W2388213847 abstract "1.The poplar leaf miner Leucoptera susinella Herrich-Schaffer is a serious pest of young poplar trees and the infested areas by the larvae form dark sears on the leaves.In Yi County of Hopei Province several species of poplar trees are infested,among which Populus tomentosa and P.sp.suffer a damage of foliage areas above 20% which would retard the growth of the trees.2.This insect has four generations in Yi County and overwinters in the pupal stage which is encased in a I-shaped cocoon usually in the crevice on the bark oron the fallen leaf in the late September or early October.A portion of the pupae may emerge into adults which lay eggs after copulation.But the young larvae cannot survive under the low temperature of late October.The adults emerge at the middle of the next April.They are positively phototactie and will oviposit on the upper surface of the poplar leaves along the midribs or side veins.About 49 eggs will be laid by each,female in average and they are grouped linearly in five to seven.The newly hatched larvae bore into the leaves in the vicinities of the eggs.3.To clean up the fallen leaves in the nursery during winter can destroy a portion of the cocoons.Spraying the leaves with 40% Roger at dilution 1:1,000 is effective to kill the mining larvae." @default.
- W2388213847 created "2016-06-24" @default.
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- W2388213847 date "1976-01-01" @default.
- W2388213847 modified "2023-09-26" @default.
- W2388213847 title "STUDIES ON THE POPLAR LEAF MINER LEUCOPTERA SUSINELLA HERRICH-SCHAFFER" @default.
- W2388213847 hasPublicationYear "1976" @default.
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