闽西北稻区“晚改中”避蚊减害技术研究与应用

Studies and applications on the technology of changing late-crop rice into middle-crop rice for avoiding and lightening demage of Rice Gall Midge in northwest of Fujian Province

针对闽西北海拔 30 0 - 5 0 0 m的单、双季水稻混栽区稻瘿蚊危害重、单季稻三代稻瘿蚊危害突出的情况 ,通过研究提出“晚改中”的依据和技术 ,在正常年份下 ,把以往 5月份播种的单季稻的播种期提早到 4月5日前 ,就可以有效地避过三代稻瘿蚊的危害 ,而不必提早到 3月 2 0日前 ,与农民农时操作习惯更吻合 ,农民更易接受采用。

Aiming at the serious damage by Rice Gall Midge(RGM)( Orseolia oryzae (Wood Mason)) to rice in the mixed planting area of single crop rice and double crop late rice and by the third generation of RGM to single crop late rice in the northwest of Fujian Province where with altitude high from 300 to 500 meter, the technology and it's theory gist were advanced: it would effectively avoid the damage of the third generation of RGM by aheading the time of seeding from May to April 5 in usual years, but it was not necessary to ahead to March 20, and it would accord with the farmer's cultivation habits to accept and apply it.