The suddenness, contingency and periodicity of its occurrence were explored and suggestions about the forecast of the pest were made.

探讨了发生的突发性、偶然性、周期性，并对该虫的调查测报等工作提出了建议。

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The result showed the lamps could exactly forecast the occurrence period and amount of the pest and effectively control the damage caused by the pest.

的预测、预报和防治实验，能准确地预测松毛虫的发生期和发生量，并能有效控制松毛虫的危害。

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Based on the forecasting equation, the occurrence amount of this pest was calculated in different metamorphosis phases.

通过虫期发生量预测式，预测不同虫态的发生量，所预测的幼虫和成虫发生盛期与实查结果基本吻合。

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