| POPULARIZATION STUDY ON THE CHEMICAL CONTROL OF COLEOPHORA DAHURICA FLKV. BY ULV SPRAYING MALATHIOR |
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| 作者姓名： | 郭成亮 宋志刚 马喜柱 何忠秋 |
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| 摘 要： | INTR0DUCTIONLarchcasebearer(ColeoPhoradahuricaFlkv)isdistributedinNortheastandeasternpartofIrmerM0ngoliaandcausesseriousdamageintheareas.Larchcasebearerlivedonegenerationinayear,liesdormancyinwin-terat3-4larvaeinstar.Damagetothetfeeismainlycausedbyoverwinteringlarvae.75%0fdefoliatedamountwascausedafterlOdays0fdormancyreleased.Fordamagedneedleonlyepidermisisleft.ItlookslikesilverflowersbloominthetreeinspringandtheWholetreetrisyell0winaut-timn.Whenhalfneedlewaseaten.tI1ewoodlossisl.2lm'…
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POPULARIZATION STUDY ON THE CHEMICAL CONTROL OF COLEOPHORA DAHURICA FLKV. BY ULV SPRAYING MALATHIOR |
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| Guo Chengliang, Song Zhigang Qinhuangdao.POPULARIZATION STUDY ON THE CHEMICAL CONTROL OF COLEOPHORA DAHURICA FLKV. BY ULV SPRAYING MALATHIOR[J].Journal of Forestry Research,1995(2). |
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| Authors: | Guo Chengliang Song Zhigang Qinhuangdao |
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| Institution: | Guo Chengliang; Song Zhigang Qinhuangdao (Animal and Plant Quarantine Bureau)Ma Xizhu (Second Forestry Survey Institute of Inner Mongolia)He Zhongqiu(Forest Management Institute of Heilongjian Province) |
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| Abstract: | The control of Coleophora dahurica Flkv. by ULV spraying rare oil of malathior was popularized in lnner Mongolia Daxing'an Mountains in 1992-1993. The control area was 32744.3hm2, which was 98.2% of the suitable control area in Inner Mongolia Daxing'an Mountains and 75%of the suitable area in Inner Mongolia respectively. Dosage was 1125 g/hm2. Control effectiveness was above 95%, the larvae density decreased from 52.5 to 0.94 per 50cm sample twig and direct economical benefit was 3,935,420 Chinese yuan. |
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| Keywords: | Popularizing Coleophora dahurica ULV Control |
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