摘要
采用踏查和详查相结合的方法,系统调查了海南省槟榔Areca catechu园内红脉穗螟Tirathaba rufivena Walker的危害情况及天敌资源种类。结果表明：红脉穗螟在树龄小于19a的中低龄槟榔植株上危害相对较重,槟榔受害率在30%以上;树龄20a以上的槟榔受害率低于25%。每年的7—9月为红脉穗螟危害高峰期,单株虫口数最高可达416.75头（树龄10~19a）,对槟榔各部位的取食偏爱顺序依次为花苞、果实、心叶、茎干。天敌资源调查结果表明,海南省红脉穗螟天敌有15种,包括寄生蜂3种,即扁股小蜂Elasmus sp.、大腿小蜂Brachymeria sp.和具瘤爱姬蜂Exeristes roborator（Fabricius）,混合寄生率在8%~32%;捕食性天敌10种,主要有黄猄蚁Oecophylla smaragdina（Fabricius）、垫跗螋Chelisoches morio（Fabricius）、中华螳螂Paratenodera sinensis（Saussure）、四斑月瓢虫Chilomenes quadriplagiata（Swartz）和六斑月瓢虫C.sexmaculata（Fabricius）;病原菌2种,其中绿僵菌Metarhizium anisopliae致病力较强。
The investigation was made with the methods of range survey and detailed investigation.The results indicated that the damage degree of Tirathaba rufivena was relatively heavier in betel plants less than 19 years old,the damage rate was above 30% while the damage rate in betel plants over 20 years old was less than 25%.The peak of damage appeared from July to September,the number of the pest was up to 416.75 insects per plant（trees aged 10-19 a）.The preference order of T.rufivena was spathe,fruit,leaf and stem.The results of natural enemy investigation indicated that there were 15 species of natural enemies of T.rufivena in Hainan province including 3 parasitoids,namely Elasmus sp.,Brachymeria sp.and Exeristes roborator（Fabricius）with the parasitization ranging from8%to 32%,10 species of predators mainly including Oecophylla smaragdina（Fabricius）,Chelisoches morio（Fabricius）,Paratenodera sinensis（Saussure）,Chilomenes quadriplagiata（Swartz）,C.sexmaculata（Fabricius）and 2 insect pathogens;among the 2 pathogens Metarhizium anisopliae showed higher virulence.
出处
《中国森林病虫》
北大核心
2016年第4期21-24,共4页
Forest Pest and Disease
基金
海南省重点研发计划项目(ZDYF 2016059)
海南省自然科学基金(314177)
海南省重大科技项目(ZDZX2013008-2)
关键词
红脉穗螟
槟榔
危害程度
天敌
海南省
Tirathaba rufivena
Areca catechu
damage degree
natural enemy
Hainan province
