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广聚萤叶甲Ophraella communa是恶性入侵杂草豚草Ambrosia artemisiifolia的一种重要专一性天敌。为了评价其对广东省豚草的野外控制效果,2009和2010年分别在佛冈进行释放,试验调查了释放后的种群动态及其对豚草的控制效果。结果表明:广聚萤叶甲在广东省佛冈县可成功建立自然种群。广聚萤叶甲释放后,其虫口密度不断增加,豚草植株的死亡率也不断上升,2009年豚草死亡率低于20%,2010年叶甲对豚草的控制作用较好,豚草死亡率可达到95%以上,而大量豚草死亡后,广聚萤叶甲的虫口密度又急剧下降。广聚萤叶甲种群扩张与气象因子有密切关系,温度偏低是5～6月广聚萤叶甲的种群数量难以扩增的主要因素,大雨频繁和光照偏少也一定程度上限制了其种群增长,7～8月是广聚萤叶甲种群激增的关键时期,此时其种群数量急剧增加。
Ophraella communa is an important natural enemy of vicious invasion of the weed Ambrosia artemisiifolia. In order to evaluate its field control effect on ragweed in Guangdong Province, it was released in Fogang in 2009 and 2010 respectively. The population dynamics after release and its control effect on ragweed were investigated. The results showed that Polygonaceae could establish a natural population successfully in Fogang County, Guangdong Province. After the release of Polygala tenuifolia, its population density increased, the mortality rate of ragweed plants also increased in 2009, ragweed mortality rate of less than 20% in 2010, the control of ragweed better, ragweed Mortality rate can reach more than 95%, and a large number of ragweed died, the broad-leaved Coprinus insect population density declined sharply again. It is closely related to meteorological factors. The low temperature is the main factor that makes it difficult to amplify the population size of Diabrotica armillaris from May to June. Frequent heavy rain and low light also limit its population to a certain extent Population growth, July to August is the key period for the population of Diabning polyphagous population, when its population increased dramatically.