摘要
水稻种植方式由育苗移栽改为水直播以后，病虫发生与危害也有了相应变化。系统监测结果主要表现为“二重”（稻象甲、恶苗病重）、“三轻”（稻螟、灰飞虱、条纹叶枯病轻）、“二推迟”（纵卷叶螟、纹枯病迟）、“三不变”（褐飞虱、穗颈瘟、稻曲病依旧）。并据此提出了推广高产抗病品种、推广群体质量栽培、改革化学防治策略、调整农药品种结构等一系列综合防治措施，从而可有效地控制病虫发生危害，达到“三增”（增产、增收、增天敌）、“三减”（减少农药用量、使用次数和农本）的显著效益。
Along w ith the change from transplanting rice to direct sow ing rice,the pests and diseases also change in paddy fields.The investigation results in direct sow ing paddyfields in Shanghaisuburbsshow thatthe occurrence ofEchinocnem ussquam eusand Gibberella fujikuro is heavy; Tryporyza incertulas,Chilo suppressalis, Sesam ia inferens, Laodelphax striatella and Stripe virus occur lightly; the infestation of Cnaphalocrocis m edinalis andPellicularia sasakit is delayed;the occurrence of Nilparvata lugens,Pyricularia oryzae and Ustilaginoidea virensrem ains unchanged.Based on these results,a series ofintegrated control m easures such as extending high yield resistant varieties, using cultural techniques ofenhancing paddy population quality,reform ing chem ical control policy,adjusting w eeding m ethods by stressing use ofherbicides and changing kinds ofpesticides are suggested.Usingthese techniques is able to increase rice yield,protect natural enem ies and reduce pesticide doses,application tim es and costs.
出处
《上海农业学报》
CSCD
1999年第4期72-75,共4页
Acta Agriculturae Shanghai
关键词
上海
水直播稻
发生趋势
防治
水稻
病虫害
Direct sow ing rice
Pests and diseases occurrence tendency
Controlstrategy
