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研究了2个转cry1Ab+cry1Ac杂合基因籼稻品系TT9-3和T19-4对主要非靶标害虫飞虱、叶蝉以及捕食性蜘蛛优势种田间种群动态的影响。结果表明,Bt稻与亲本对照(IR72)田间白背飞虱和黑尾叶蝉成虫的虫口密度在整个水稻生育期间无显著差异,而若虫密度有一定的不同。TT9-3稻田中白背飞虱和黑尾叶蝉若虫密度分别于移栽后早中期和中后期显著高于对照;TT9-4与对照间无显著差异。Bt水稻与亲本对照间锥腹肖蛸、四斑锯螯蛛、食虫沟瘤蛛、拟环纹豹蛛及拟水狼蛛种群数量动态趋势相似,数量上大多无显著差异。综合分析认为,Bt水稻对稻田优势蜘蛛基本上无明显的负影响。
The effects of TT9-3 and T19-4 indica hybrids of two cry1Ab + cry1Ac transgenic lines on the population dynamics of dominant non-target pests, leafhoppers and predatory spiders were studied. The results showed that there was no significant difference in population density between adult whitebacked planthopper and black tailed leafhopper in Bt rice and the parental control (IR72) during the whole growth period of rice, but the density of nymphs was different. The density of whitebacked planthopper and black-tailed leafhopper in TT9-3 paddy were significantly higher than that of the control in the early, middle, late and mid-term after transplanting respectively; there was no significant difference between TT9-4 and the control. The dynamic trends of the population dynamics of B. tabaci, D. salicornatus, M. furculoides, T. gondii and T. wolfii in Bt rice and its parental control were similar, and most of them showed no significant difference. Comprehensive analysis shows that Bt rice has no obvious negative effect on dominant spider in paddy field.