性信息素和香根草在盐碱地稻二化螟绿色防控中的应用

The application of insect sex attractant and vetiver to reducethe damage caused by Scirpophaga incertulasin organically grown rice

【目的】探索滨海盐碱地水稻生态种植模式下,利用性诱剂和香根草对水稻二化螟的综合防治效果。【方法】在0.3%~0.6%的土壤盐分下,种植中粳中晚熟南粳9108水稻品种,设置4种绿色防控措施,每15~20 d调查诱捕螟虫量、虫害穴率、虫害株率、防治效果,并比较水稻的食味品质、生长和产量指标。【结果】综合利用性诱剂和香根草对水稻螟虫的综合防治技术,可以降低虫害穴率7.10%,降低虫害株率5.72%,防治效果达87.31%,可以显著的提高水稻结实率22.80%,稻谷产量为6810.45 kg·hm-2,提高了22.35%,显著提高了稻米的外观品质,食味值提高了4.29%。【结论】性诱剂与香根草配合进行水稻螟虫的绿色防控,可以作为滨海盐碱地水稻生态种植模式的主要防控措施。

【Aim】The purpose of this study is to explore the integrated control potential of the use of sex attractant and vetiver(Chrysopogon zizanioides)on rice borer infestation in organically grown rice on coastal saline alkali land.【Method】The rice cv.Nanjing 9108 was planted in soil with a 0.3%-0.6%soil content.We set up 4 treatments:sex attractant only;vetiver only;sex attractant plus vetiver,and a no-treatment control.Every 15-20 days,we censused the plots to obtain data on borer abundance,the rate of pest holes,the rate of pest plant infestation.We also measured plant growth,yield and eating quality of the rice.【Result】Comprehensive utilization of sex inducer and vetiver to control rice borer can reduce the pest hole rate by 7.10%,reduce the pest damage rate on rice by 5.72%.The control effect of rice borer was 87.31%.The seed setting rate significantly improved by 22.80%.The rice yield was 6810.45 kg·hm-2,which increased by 22.35%.Significantly improved the appearance quality of rice,and increase the eating value by 4.29%.【Conclusion】The combination of sex attractants and vetiver can be used as the main control measures against the rice borer in organiclaly grown rice on coastal saline alkali land.