Sublethal concentrations of azadirachtin affect food intake, conversion efficiency and feeding behaviour of Spodoptera littoralis (Lepidoptera: Noctuidae)
Sublethal concentrations of azadirachtin affect food intake, conversion efficiency and feeding behaviour of Spodoptera littoralis (Lepidoptera: Noctuidae)
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DOI：
10.1017/s0007485399000085
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发表时间：
1999-02-01
影响因子：
1.9
通讯作者：
van Emden, HF
中科院分区：
文献类型：
--
作者：
Martinez, SS;van Emden, HF
亚致死浓度的印楝素纳入人工饲料，并提供给三龄幼虫的Spodoptera littoralis（Boisduval）延长幼虫龄期，减少食物摄入量。这些影响是在处理过的幼虫被转移到普通饮食后观察到的;因此，摄食量减少是一种继发性拒食作用。印楝素不影响消化效率，但降低了幼虫将摄入和消化的营养物质转化为生长的能力，特别是在处理后立即。一旦印楝素处理停止，这种效应就随着时间的推移而下降。生长比摄食量减少更严重，生长减少也发生在摄食量不受影响的时期，可能是由于摄食后效应。
Sublethal concentrations of azadirachtin incorporated into artificial diet and offered to third-instar larvae of Spodoptera littoralis (Boisduval) prolonged larval instars and reduced food intake. These effects were observed after the treated larvae had been transferred to plain diet; the reduced food intake was therefore a secondary antifeedant effect. Azadirachtin did not influence digestion efficiency but diminished the ability of the larvae to convert both ingested and digested nutrients into growth, particularly immediately after treatment. This effect declined with time once the treatment with azadirachtin had ceased. Growth was more severely reduced than food intake, and the reduction in growth also occurred during periods when food intake was not affected, possibly due to post-ingestive effects.