稻藕套种田与常规种植田晚稻主要病虫发生对比研究

本文研究了2009-2010年稻藕套种田及常规种植田的3种主要水稻病虫——稻飞虱、稻纵卷叶螟、稻纹枯病的发生情况.在水稻分蘖期到乳熟期内每5d对水稻病虫害发生量系统调查1次,共调查11次.结果表明:套种田比常规田病虫害发生轻,且总体差异显著.因此,从植保角度来看,稻藕套种技术可以有效控制水稻主要病虫害发生,从而有助于农民获得莲藕和水稻的双重收益.

Comparative studies on major pests of late rice occuring in rice lotus relay cropping fields and pure paddy fields

Three major rice pests,rice plant hopper,rice leaf roller and rice sheath blight,occuring in pure paddy fields and rice-lotus relay cropping fields were studied from 2009 to 2010.From rice tillering stage to milky ripe stage,systematic observations were made for 11 times,once every 5 days.The observations proved that the pests in relay cropping fields occurred less than those in pure paddy fields.Moreover,there was significant difference in the mass between them.Consequently,in view of plant protection,rice-lotus relay cropping could effectively control pest populations,hence help the peasants gain dual advantages in lotus and rice production.