鲁西南甘薯天蛾发生规律及防治研究

Occurrence and control of Herse convolvuli Linnaeus in southwest Shangdong

甘薯天蛾在鲁西南一年发生３－４代，以蛹在土中７－１５ｃｍ深处越冬。各代幼虫发生期：第１代发生在５月下旬至６月下旬，第２代于７月上旬至下旬，第３代８月上旬至９月上旬，而第４代则于９月上旬至１０月下旬。发育起点温度１５．６±１．３℃，有效积温３７０．６±１３日度。温度、天敌、降水是影响此虫发生的重要因素。采用高效低毒农药、点灯诱杀、保护利用天敌等措施综合防治甘薯天蛾，有较好的防治效果。

Palaearctic sweet potato hornworm, Herse convolvuli Linnaeus, occurs 3-4 generations per year in southwest Shandong, China. The pupa overwinters under the soil of 7-15cm depth. The larval stage of various generations occurs respectively as follows: The 1st generation usually occurs from the last ten days of May to the last ten days of June; The 2nd generation from the first ten days to the last ten days of July; The 3rd generation from the first ten days of August to the first ten days of September; The 4th generation from the first ten days of September to the last ten days of October. The developmental zero and effective cumulative temperature is 15.6±1.3℃ and 370.6±13 dates-temperature respectively. Temperature, rainfall and natural enemies are the important factors in occurrence of the pest. The better control effects could be obtained by the integrated control measures such as the highly effective and low toxic pesticide, destroying by trap lamp, and protection and utilization of natural enemies.