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在山东烟区 ,烟蚜主要发生于 5月下旬至 6月上旬 ,烟青虫种群数量在 6月中旬至下旬较高。捕食性天敌主要有瓢虫、草蛉、食虫蝽、隐翅虫和蜘蛛 ,但是发生数量低、数量高峰明显滞后于害虫数量高峰。优势寄生性天敌有寄生于烟蚜的烟蚜茧蜂和寄生于烟青虫幼虫的棉铃虫齿唇姬蜂及中华卵索线虫。烟蚜茧蜂和烟蚜种群数量之间具有显著的相关 ,5月底到 6月中旬益害比大于或接近 1 ;齿唇姬蜂对烟青虫 1～ 3龄幼虫的寄生率 6月份为 74 0 % ,7月份为 4 9 8% ;中华卵索线虫仅发生于 7月中旬 ,对 3龄以上烟青虫幼虫的寄生率为 35 2 %。
In Shandong tobacco area, the main aphid occurred in late May to early June, the population of tobacco budworm in mid-June to late higher. Predatory natural enemies are ladybugs, weeds, insectivores, stinkbugs and spiders. However, the number of predatory enemies is low and the number of peaks is obviously lagging behind that of pests. The dominant parasitic natural enemies of the aphid parasitized in the aphids and the parasitic tobacco budworm larvae Helicoverpa armigera and Chinese Eggplant nematode. There was a significant correlation between the population of Aphididae and Myzus persicae, and the ratio of harm to harm was greater than or close to 1 in the end of May and the middle of June. The parasitism rate of 1st and 3rd instar larvae of A. glauca in June was 74 0 %, 47.8% in July; Chinese oyster Nematode occurred only in mid-July, the parasitism rate of tobacco budworm larva of more than 3 years old was 35 2%.