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枣顶冠瘿螨的发生危害期为4~10月。枣树1~3年生的枝条叶片上虫量分布为40%、30.2%和29.8%;同一枣吊上以第3~8片叶上分布最多,第1、2片叶次之,9~12片叶上最少;叶正、反面和蕾(花)上的分布各占33.0%、56.7%、11.3%。5月份向阳面(南)发生量为背阴面(北)的1.3倍,7月份后者又为前者的1.6倍。庭院、近村、农田种植的枣树发生量各占68.7%、19.1%、12.2%;降雨可减少虫口50%~77.9%;枣树受害后叶绿素减少,叶组织含水量降低,光合作用强度减弱。制定出5月下旬单叶平均0.6头为防冶适期和指标,且以氧乐果等常规农药及洗衣粉树冠喷治,防治效果均达90%以上,社会经济效益显著。
Jujube crown crown scabies mites occurrence of damage period of 4 to 10 months. The juvenile tree branches from 1 to 3 years old had 40%, 30.2% and 29.8% of the total number of the leaves, while the 3rd to 8th leaves on the same jujube were the most distributed, followed by the 1st and 2nd leaves , The least in 9 ~ 12 leaves; the distribution in leaves positive, the opposite and buds (flowers) accounted for 33.0%, 56.7% and 11.3% respectively. The amount of sunning surface (south) in May was 1.3 times that of the shady area (north), and that of the latter was 1.6 times that of the former in July. The occurrence of jujube trees in the courtyard, near village and farmland accounted for 68.7%, 19.1% and 12.2% respectively; rainfall reduced 50% ~ 77.9% of the population; Water content decreased, photosynthesis intensity weakened. An average of 0.6 heads of single leaves in late May was formulated as the suitable stage and index of prevention and cure. In addition, the control effect of conventional pesticides such as omethoate and cannonballs was more than 90%, with significant social and economic benefits.