转植酸酶基因玉米对田间主要害虫和天敌种群动态的影响

Effects of Phytase Transgenic Maize on Population Dynamics of Main Pests and Their Natural Enemies in Field

为了研究转植酸酶基因玉米对田间主要害虫和天敌种群消长动态的影响,本研究在大田种植条件下,对玉米整个生长期内田间主要害虫和天敌的种类和发生数量进行定期调查和比较分析。结果表明,转植酸酶基因玉米‘10TPY005’与非转基因亲本玉米‘蠡玉35’、当地常规玉米‘郑单958’3个处理间的4种害虫和3种天敌的种群消长趋势基本一致,种群发生数量除个别调查时间差异显著外,在生育期的大部分阶段,3个处理间无显著性差异。在收获期剖秆调查了玉米螟的每株蛀孔数、每株秸秆和果穗中的虫量以及虫体重量,结果表明3个处理间差异不显著。因此,转植酸酶基因玉米的短期种植,未对田间主要害虫及天敌种群动态产生显著影响。

During corn growth period, the species and population of main pests and their natural enemies were investigated regularly in field and analyzed, in order to evaluate the effects of phytase transgenic maize on their population dynamics. The results showed that the population dynamics of main pests and their natural enemies in the field of phytase transgenic maize ＇10TPY005＇ were consistent with that in the field of its non-transgenic parent ＇Liyu 35＇ and local corn variety ＇Zhengdan 958＇. At most of corn growth stages, no significant differences were observed among the density of pests and natural enemies in the three treatment plots. During harvest, the holes and worms of corn borer in corn stalks and ears were examined, and the worm bodies were collected and weighed; the results also showed that there was no significant difference. So in the short term, the phytase transgenic maize had no effect on the population dynamics of main pests and their natural enemies in cornfield.