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稻纵卷叶螟的发生与危害程度除了受迁入虫源和寄主生育状况的影响外,还和天敌有着较为密切的关系。几年来,对稻纵卷叶螟的天敌种类、跟随关系、控制作用及影响因素等方面作了一些基本调查与分析,情况如下。一、稻纵卷叶螟的天敌种类根据几年来的调查,河南稻纵卷叶螟的天敌有48种,隶属于6目20科。其中卵期天敌五种,拟澳洲赤眼蜂(Trichogramma confusum)为优势种,幼虫期天敌24种;蛹期天敌4种;成虫期天敌10种;重寄生天敌三种。以下10种为稻纵卷叶螟天敌新记录: 幼虫期天敌:1.腹沟茧蜂Microplitis sp., 2.龟纹瓢虫Propylaea japonica,3.黑斑足突眼隐翅虫Stenus cicindela,4.小黑足突眼隐翅虫Stenus veecundus。
The occurrence and harm degree of rice leaf roller is not only influenced by the migratory insect and host, but also has a close relationship with natural enemies. In the past few years, some basic investigations and analyzes have been made on the types of natural enemies of the rice leaf roller, their follow-up relations, their control effects and their influencing factors. The situation is as follows. First, the rice leaf roller borer species of natural enemies According to the investigation of the past few years, Henan Cnaphalocrocis medinalis 48 species, belonging to 6 orders 20 families. Trichogramma confusum was the dominant species, 24 species of natural enemies during larval stage, 4 species of natural enemies at pupal stage, 10 species of natural enemies during adult stage and three species of parasitoid natural enemies. The following 10 species of rice leaf roller borer new records of natural enemies: natural enemies of larvae: 1. Calycidae Microplitis sp., 2. Propylaea japonica Propylaea japonica, 3. Paleopteryx stinkfly Stenus cicindela, 4 Small black foot pest.