Synchronizing Mass Emergence of Xyletinus peltatus (Harris) (Coleoptera: Anobiidae) Adults

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Abstract
Possible stimuli for the mass emergence of adult beetles [Xyletinus peltatus (Harris)] were studied by exposing five test groups of 78-week-old larvae within wood to several combinations of temperature and relative humidity (RH) for arbitrary periods while a control group was maintained in constant favorable (25°C, minimum 70% RH) conditions. Differences in patterns of adult emergence from the six test groups were analyzed with the three-parameter Weibull probability function as a model. The analyses showed all stress treatments did cause significantly more (α ≤ 0.05) beetles to emerge in a shorter period than in the control group, but the treatments did not change the time of earliest potential emergence or the basic right-skewed emergence pattern. Potential factors for the synchronization of mass emergence are discussed.

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