西藏飞蝗各发育阶段的耐寒性
Cold- hardiness of Locusta migratoria tibetensis in each developmental stage.
王思忠1；李 庆2**；封传红3；张 敏2；蒋 凡3；杨 刚4；罗林明3
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作者单位：1 成都市植物园 成都 610083; 2 四川农业大学农学院 雅安 625014;3 四川省农业厅植物保护站 成都 610041; 4 甘孜州植保植检站 康定 626000
中文关键词：西藏飞蝗, 过冷却点, 结冰点, 耐寒性
英文关键词：Locusta migratoria tibetensis , super- cooling point, freezing point, cold- hardiness
中文摘要：西藏飞蝗Locusta migratoria tibetensis Chen 是青藏高原的重要农牧业害虫。对该虫各发育阶段的过冷却点和结冰点的测定表明, 西藏飞蝗卵的过冷却点和结冰点为最低, 分别为- 22.02℃、- 16.36℃ ,4 龄蝻的过冷却点和结冰点最高, 分别是- 6.46℃和- 5.05℃, 西藏飞蝗在甘孜以卵越冬。
英文摘要：Locusta migratoria tibetensis Chen is an important pest of agriculture and animal husbandry in Qinghai- Tibet Plateau. The super- cooling point and freezing point of the L . migratoria tibetensis in each developmental stage were tested. The results indicated that the super- cooling point and freezing point of egg were the lowest among all stages, which was – 22.02℃and – 16.36℃, respectively. The super- cooling point and freezing point of 4th instar nymph were the highest among all nymph stages, which were – 6.46℃ and – 5.05℃ respectively. So L. migratoria tibetensis overwinters in egg in Ganzi State, Sichuan.