江苏省旱育秧及抛栽稻田病虫演变规律和防治策略研究

EVOLUATION AND CONTROL STRATEGY OF THE DISEASE AND PEST IN THE DRY RICE SEADLING BED AND THROW TRANSPLANT SEADLING MODE IN JIANGSU

对江苏省旱育秧和抛栽田病虫演变特征及防治对策研究表明，旱秧田主要地下害虫为蝼蛄、蚯蚓。恶苗病、苗稻瘟发病率分别是水秧田的０．９１～２．１５倍和５倍，青枯和立枯病明显上升，而１代螟虫产卵量、螟害率明显轻于水秧田。抛秧田发生病虫种类相同，但纹枯病、螟虫、卷叶螟发生明显重于常规栽插田，稻飞虱发生轻于常规手栽田。

The evoluation and control strategy of the disease and pest in “the dry rice seedling bed” and “throw transplant rice mode” are studied in the paper. Studies shown that: 1.Earthworm, Gryllotolpa of rice palisot de Beauvois is major underground pest disease rate of Gibberella fujikuroi and pyricularia oryzea in dry rice seeding is 0.91～2.15 times and 5 times as much as that in water rice seadling. Amount of egg laid and injury rate of stem borer are less than that of conventional transplant mode significantly. 2.Species of disease and pest are the same between mode of conventional and throw transplant. But, injury of pellicularia sasakii stem borer cnaphalocrocis medinalis in throw transplant is more serious than that of in conventional transplant. Development of rice planthopper in throw transplant mode are less than that in conventional transplant.