防虫网覆盖对甘蓝虫害防控和生长的影响

Effects of Using Fly Net on Pest Control and Growth of Cabbage

目的以"春丰60"甘蓝为试材,比较研究覆盖防虫网对大棚内气象因子的变化、对甘蓝虫害的防控效果以及甘蓝生长和产量的影响。方法测定网棚和露地条件下气象因子、甘蓝不同生育期虫害、收获时植株性状和产量的变化。结果在甘蓝生长季,防虫网棚内的平均温度和平均湿度较对照分别高出0.66℃和1.55%,而网棚内的平均光照强度较对照降低6.02%,覆盖网棚为甘蓝生长创造了适宜的环境。覆盖防虫网完全阻止了菜青虫和棉铃虫对甘蓝的危害,且网棚内各时期蚜虫危害株率较对照降低幅度达82.5%~95.7%,对蚜虫的防效显著。收获时甘蓝植株的各项生长指标均显著高于对照,且产量较对照提高9.2%。结论防虫网在冀西北坝上地区蔬菜生产中具有良好的开发、应用和推广前景。

Objective Taking “Chunfeng 60”cabbage as material,the effects of using fly net on the change of meteorological factors within a plastic greenhouse, pest control, growth and yield of cabbage were studied.Methods Meteorological factors, pest control, growth and yield of cabbage were meas-ured in fly net and open field.Results In cabbage growing season,the average temperature and humidity were increased 0.66 ℃ and 1.55%,respectively.But the average light intensity in fly net decreased by 6.02%,which created the appropriate environmental conditions for cabbage.Fly net completely preven-ted the harm of caterpillar and cotton bollworm on cabbage.The aphid damage rate in fly net in each peri-od of cabbage was 82.5%~95.7% lower than control,and the aphid control effect in fly net was remarka-ble.And at harvest,the plant growth indexs of cabbage were significantly higher than control,and that the yield in fly net was 9.2% higher than control.Conclusion Fly net has a good prospect of develop-ment, application and promotion in vegetable production in the northwest of Hebei Bashang area.