红树林丽绿刺蛾的抗逆性研究

Latoia lepida is one of the main defoliators for the mangrove forest. The survey in the forest revealed that L.lepida principally distributed on the middle and upper parts of crown, the position soaked by seawater for short time gradually decreased from the internal beach to the external beach, the average injured percentage was 46.3% on the internal beach (high tide position), and the average injured percentage was only 13.8% on the external beach (middle tide position). The seawater soak-resistant experiment indicated that the influence of different soak times existed the extremely marked different on L.lepida survival rate, the population mortality rate increased with the increase of soaking time after soaking for more than 4 h, the population mortality reached the peak at the time of soaking for 8 h, and then the population survival rate stabilized to a certain level. The difference was not obvious among various-generation larval adversity resistance, the difference was evident among various-instars larval adversity resistance, the adversity resistance of larvae on seawater soaking was the main reason for the larval population distribution law and the large outbreak of L.lepida in the forest.

胡椒丽绿刺蛾的发生及防治

丽绿刺蛾在海南胡椒种植区每年发生2～3代,以老熟幼虫在主蔓上结茧越冬。该虫1年有2次发生高峰期,分别在5月下旬至6月中下旬和7月下旬至9月中旬。第1代幼虫发生量大,危害严重,是防治的关键时期。根据其发生规律提出相应的防治策略。

两种菠萝蜜新发生害虫的识别与防治

对菠萝蜜上新发现的素背肘隆螽(Onomarchus uninotatus)和丽绿刺蛾(Latoia lepida)两种害虫进行了初步研究。详细描述了两种害虫的为害症状、识别特征、发生规律及防治措施,为生产上识别此类害虫并进行有效防治提供参考依据。

黄宽颚步甲对丽绿刺蛾和茶毛虫幼虫捕食量测定

本文简述了黄宽颚步甲(Parena rufotescea Jedi)形态特征和在湖南省的发生情况,及捕食丽绿刺蛾、茶毛虫幼虫前期各龄的数量作了测定:明确该步甲是两种害虫的幼龄幼虫的劲敌,平均每天捕食量分别为5.1头,6.8头;提出了保护利用措施。

两色绿刺蛾观察及防治试验

本文对两色绿刺蛾幼虫的形态特征和生活习性进行了一般的观察,并使用白僵菌粉炮和1.2%苦参·烟碱烟剂进行了防治试验。结果表明,白僵菌防治两色绿刺蛾效果明显,能有效控制该虫的危害。

3种生物农药林间防治丽绿刺蛾试验

应用1．8％森得保可湿性粉剂、1．8％除虫菊·苦参碱水乳剂、1．2％苦·烟乳油3种生物农药对丽绿刺蛾（Latoia lepida Ctamer）3～4龄幼虫进行了林间防治试验。结果表明，森得保550g·hm-2对丽绿刺蛾的防治效果为90．13％，最为经济有效；1．8％除虫菊·苦参碱水乳剂450～150mL·hm-2对丽绿刺蛾的防治效果为83．29％-90．13％；1．2％苦·烟乳油750、650和550g·hm-2等3种浓度的防治效果均为100％，防治效果最好。