›› 2000, Vol. 43 ›› Issue (-1): 186-190.

• 研究论文 • 上一篇    下一篇

以生物防治为主持续治理中华稻蝗的初步研究

刘文旭,严毓骅   

  • 出版日期:2000-12-20 发布日期:2000-12-20

A preliminary investigation on sustainable management of Oxya chinensis (Thunb.) mainly with biological agents

LIU Wen-xu,YAN Yu-hua   

  • Online:2000-12-20 Published:2000-12-20

摘要: 1~3龄蝗蝻主要聚集于田埂、地头取食杂草,随后逐渐扩散到稻田内,4~6龄蝗蝻在稻田内趋于均匀分布。卡死克对中华稻蝗的致死中浓度(LC50)为54.27 μg/mL,田间用5%卡死克®水剂喷雾防治,以105 mL/hm2为最佳用量。卡死克与蝗虫微孢子虫协调应用于防治高密度稻蝗时,两者以2∶1的比例进行地毯式喷施效果最佳,当年感染微孢子虫的蝗虫达35.6%。这种防治措施费用低,持效期长,在持续性综合治理稻田蝗害中有很好的应用前景。

关键词: 中华稻蝗, 生物防治, 卡死克, 蝗虫微孢子虫, 可持续性治理

Abstract: Distribution of Oxya chinensis was investigated in rice field and the result indicated that 1~3 instar nymphs mainly gathered on weeds around the field. When they grew up to 4~6 instars, the nymphs gradually dispersed into the field. The laboratory experiments showed that the LC50 of 5% Cascade® (IGR) against the grasshoppers was about 54.27 μg/mL. The optimum dosage for field spraying was estimated at 105 mL/hm2. When high density of the insect pest occurred, the integrated application of Nosema locustae and IGR was effective and more than 35.6% of the surviving grasshoppers were infected by N. locustae. This is a lowcost and sustainable measure with good prospects in practical application.

Key words: Oxya chinensis, biocontrol, Cascade, Nosema locustae, integrated application