山东苜蓿地主要害虫种群的消长规律

The Field Growth and Decline Rule of Main Pests in Alfalfa in Shandong Province

于2011-2012年对山东苜蓿（Medicago Sativa）地的主要害虫种群消长规律进行了调查,结果表明,山东苜蓿地的主要害虫有蚜虫（Aphidoidea）、蓟马（Thripinae）、叶蝉（Cicadellidae）、盲蝽（Miridae）等;蚜虫的主要发生期在4月中下旬至5月上中旬;蓟马在苜蓿的整个生育期都有发生,为害盛期在6月至8月中旬,第二、三茬苜蓿受害严重;盲蝽在6、7月发生较普遍;叶蝉主要发生在6月中旬到8月中旬。

The field growth and decline law of the main pests in alfalfa in Shandong province were studied from 2011 to2012. The results showed that the dominant species of pests in alfalfa were Aphidoidea, Thripinae, Cicadellidae, Miridae and Agromyzidae in Shandong province. Aphids occurred mainly from mid-late-April to mid-May. Thripinae occurred in the whole growing season of the alfalfa and the occurrence reached the peak from June to mid-August, with the Second and the third harvest suffering the most.Miridae occurred seriously in June and July. Cicadellidae occurred commonly in July and June.Cicadellidae occurred mainly in the mid- July and mid-August.