不同赤眼蜂蜂种防治向日葵螟的应用效果

Control Efficacy of Sunflower Moth with Different TrichogrammaSpecies

为了筛选出黑龙江地区防治向日葵螟的赤眼蜂优势种,扩繁优势蜂种,提高防治效果,以满足向日葵螟绿色防控的需求,在黑龙江省甘南县开展了不同赤眼蜂蜂种防治向日葵螟试验。结果表明:在半自然条件(田间网罩)下,螟黄赤眼蜂对向日葵螟卵的日平均寄生率55.7%;在向日葵田间试验调查,螟黄赤眼蜂卵粒校正寄生率达83.3%,防治向日葵螟平均防治效果达到77.5%,为该地区防治向日葵螟的优势蜂种。

In order to screen the dominant species of Trichogramma against sunflower moth in the region ,prop‐agate to advantage the species of Trichogramma ,and improve the control efficacy to satisfy the needs of bio‐logical control for sunflower moth ,different Trichogramma species of controlling sunflower moth in Gannan county of Heilongjiang province was studied .The results showed that the average daily parasitic rate of T ri‐chogramma chilonis on eggs of sunflower moth was 55 .7% under semi‐field condition ;the corrected parasitism of host eggs of Trichogramma chilonis was 83 .3% in the sunflower field ,the mean control efficiency of T ri‐chogramma chilonis against sunflower moth was 77 .5% ,Trichogramma chilonis was the dominant species of Trichogramma against sunflower moth in the region .