Migration and the effect of three environmental factors on the pre‐reproductive period of the cotton‐boliworm moth, Helicoverpa armigera
Migration and the effect of three environmental factors on the pre‐reproductive period of the cotton‐boliworm moth, Helicoverpa armigera
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棉铃虫的迁徙及三种环境因素对棉铃虫繁殖前期的影响
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
A. G. Gatehouse
中科院分区：
文献类型：
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作者：
J. Colvin;A. G. Gatehouse
摘要。蛾类的迁徙通常发生在成虫性不成熟的时候，因此生殖前期提供了迁徙飞行可用时间的指示。棉铃虫Helicoverpa armigera（Hb.）（鳞翅目：夜蛾科）被认为是一种兼性迁徙动物，为适应当地环境条件的恶化而迁徙，以利于成虫存活和幼虫发育;因此，研究了温度、蒸汽压不足和糖溶液的可用性对繁殖前期持续时间的影响。温度低于28 ° C会延长雌性的前期生殖期，但与Isley（1935）对Helicoverpa zea（Boddie）的发现相反，温度高于28 ° C会缩短它们。雌性维持在23.7 ± 0.5 mmHg的蒸汽压差（c. 12% r.h.）和6.45 ±0.15mmHg（c. 76% r.h.）没有显著不同的前生殖期分布。10% w/v糖溶液（随意提供）的可用性对两种性别的存活率和生殖前期均有显著影响。蛾给予水四个晚上，糖溶液之后，需要显着更长的时间达到生殖成熟比那些给糖溶液从出现。在整个生命中只给水的蛾的生殖成熟存活率很差（c。20%）。这些发现对H. armigera讨论。
ABSTRACT. Migration by noctuid moths generally occurs while the adults are sexually immature, and so the pre‐reproductive period provides an indication of the time available for migratory flight. Helicoverpa armigera (Hb.) (Lepidoptera: Noctuidae) is considered to be a facultative migrant, emigrating in response to a deterioration in local environmental conditions for adult survival and larval development; hence the effects of temperature, vapour‐pressure deficit and the availability of sugar solution on the duration of the pre‐reproductive period are investigated. Temperatures below 28oC lengthened female pre‐reproductive periods but, contrary to the findings of Isley (1935) for Helicoverpa zea (Boddie), temperatures above 28oC shortened them. Females maintained at a vapour‐pressure deficit of 23.7 ± 0.5 mmHg (c. 12% r.h.) and 6.45 ±0.15mmHg (c. 76% r.h.) did not have significantly different pre‐reproductive period distributions. The availability of 10% w/v sugar solution (provided ad libitum) had a marked effect on both the survival and the pre‐reproductive period of both sexes. Moths given water for four nights followed by sugar solution thereafter, took significantly longer to reach reproductive maturity than those given sugar solution from emergence. Survival to reproductive maturity of moths given water only throughout their lives was poor (c. 20%). The significance of these findings to the migratory behaviour of H. armigera is discussed.