THERMAL AND THERMOPERIODIC EFFECTS ON LARVAL DEVELOPMENT AND DIAPAUSE IN THE EUROPEAN CORN-BORER, OSTRINIA-NUBILALIS
THERMAL AND THERMOPERIODIC EFFECTS ON LARVAL DEVELOPMENT AND DIAPAUSE IN THE EUROPEAN CORN-BORER, OSTRINIA-NUBILALIS
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DOI：
10.1016/0022-1910(83)90113-0
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发表时间：
1983-01-01
影响因子：
2.2
通讯作者：
BECK, SD
中科院分区：
文献类型：
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作者：
BECK, SD
研究了温度和温周期对欧洲玉米螟幼虫发育和滞育诱导的影响。nubilalis在温周期和恒温条件下，测定了前4龄幼虫的发育起点温度。阈值在2种条件下是相似的，但第4龄幼虫表现出显着较低的发展阈值温度比的早期龄期的特征。虽然发育时间（天每龄）没有受到很大的影响波动的温度制度，在第4和第5（最后）视距的增长量（重量，头宽）是更大的thermopperiodic制度下比可比的恒温条件下。通过具有相同的平均温度，但不同的冷冻期持续时间的温周期制度，它表明，滞育的诱导是依赖于冷冻期的持续时间，而不是在温周期的平均温度。为了有效，冷冻相必须低于昆虫的温度周期反应阈值。在连续黑暗饲养条件下容易产生的温度周期反应在连续光照下不表现出来。
Effects of temperature and thermoperiod on larval development and the induction of diapause were investigated in the European corn borer, O. nubilalis. Developmental threshold temperatures characterstic of the first 4 larval instars were estimated under both thermoperiods and constant temperatures. Threshold values were similar under the 2 conditions, but the 4th larval instar displayed a significantly lower development threshold temperature than was characteristic of the earlier instars. Although developmental times (days per instar) were not greatly affected by fluctuating temperature regimes, the quantity of growth (weight, head width) during the 4th and 5th (last) stadia was much greater under thermoperiodic regimes than under comparable constant temperature conditions. By means of thermoperiodic regimes having identical mean temperatures but different cryophase durations, it was demonstrated that the induction of diapause is dependent on the duration of the cryophase rather than on the mean temperature of the thermoperiod. To be effective, the cryophase must be colder than the insect''s thermoperiodic response threshold. Thermoperiodic responses that are readily produced under continuously dark rearing conditions are not manifested under continuous light.