为了探明水稻育秧返栽田与移栽大田稻水象甲幼虫数量的差异,为稻水象甲的防控提供依据,对洗秧前后、育秧返栽田与移栽大田的稻水象甲幼虫数量进行调查,并进行了稻水象甲幼虫在秧苗上的回接试验.结果表明:洗秧能洗掉稻水象甲幼虫,而洗掉于秧田的幼虫有42.00％～90.00％的能转移到返栽的水稻根上危害；水稻秧田期为稻水象甲的主要防治时期,育秧返栽田为重要防治田块.%To explore the quantity variance of the larva of L. Oryzophilus in rice seedling back planted field and transplanting field and provide reference for the control of L, oryzophilus, the author investigated the quantity of the larva of L. Oryzophilus in the period before and after washing seedling, seedling back planted field and transplanting field. The tieback test of the larva in the seedling was conducted as well. The results showed that the washing seedling could reduce the larva but 42. 00% ~ 90. 00% of the washed larva in the rice seedling bed could do harm again when they were transferred to the root of the back planted rice. The nursery period was the main prevention and control period and the rice seedling back planted field was the important prevention and control field.
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