不同灌水条件下棉蚜发生的规律

The Studies on the Occurrence Law of Aphis gossypii Glover in Different Conditions of Irrigation

对滴灌与沟灌两种不同灌水方式下棉蚜发生动态进行了系统调查,并研究了滴灌条件下不同灌水量以及同一灌水量不同灌水时期棉蚜的发生规律。结果表明:膜下滴灌条件下棉花蕾期棉蚜发生数量较常规灌水方式轻,花铃期以后差异不显著;滴灌条件下不同水量间棉蚜发生数量有差异,低水量有助于棉蚜发生,高水量不利于棉蚜发生;常规灌溉量条件下花蕾期提前灌水和推后灌水对棉蚜发生的影响不大。

The occurrence law of Aphis gossypii Glover has been studied in different irrigation methods, the different irrigation quota and different periods of irrigation with the same irrigation quota under the conditions of drip irrigation. The results showed： during the cotton bugs stage, the occurrence degree of A. gossypii under mulched drip irrigation was lighter than the normal furrows irrigation method, but was not significantly different after the boiling stage. The occurrence degree of A. gossypii was different during different irrigation quota, the low water quantity was favorable to the occurrence of A. gossypii ,but the higher water quantity wasn＇t. There was also not significant difference to the occurrence of aphis between aheading one week for irrigation to pushing one week for irrigation based on the middle irrigation quota in budding stage.