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1.在南京为害大豆的食心虫以豆荚螟Etiella zinckenella(Tr.)为主,大豆食心虫Grapholitha glocinivorella Mats.次之。 2.在南京,皖南等地豆荚螟的寄主有大豆G1ycine max L;光叶紫花苕子(Vicia sp.);毛叶紫花苕子Vicia villosa Roth;嘉于苕子Vicia cracca L;豌豆Pisum sativum L;豇豆Vigna sinensis;檉蔴(Crotalaria juncea L);猪尿豆C.Spectibilis;洋槐Robinia psendacacia L.及苦参Sophora flavrscens Ait。 3.关于豆荚螟各期形态在文中详加记述。 4.豆荚螟在南京全年发生5代,其中部份仅4代,第1代成虫于5月初羽化,是时大豆尚未开花,幼虫寄生于其他豆科植物,如洋槐、苕子、豌豆等。成虫产卵于荚表面业毛间,少数可产于花萼下,或叶柄基部,幼生孵化后,在荚面爬行1—2小时,于背阳荚面凹入部蛀入荚内,老熟幼虫脱荚入土作茧化蛹,以第四代或第五代老熟幼虫(少数蛹可以越冬),于9月下旬起陆续在土内结茧过冬。越冬幼生于3月下旬大量死亡,可能受真菌寄生所致。 5.豆荚螟幼虫期在南京查得有二种寄生蜂(姬蜂Cremastau sp.及小茧蜂Microbracon sp.)但寄生率极低,无利用价值。 6.影响豆荚螟为害的几种因子 ①地势与土壤湿度:豆荚螟为害以高地重于低地,室内试验证明,土壤湿度高可增加土中幼虫的死亡率,尤其是越冬期间,
1. The worm that attacked soybean in Nanjing was dominated by Etiella zinckenella (Tr.), Followed by Grapholitha glocinivorella Mats. In Nanjing, southern Anhui and other places pod borer host soybean G1ycine max L; light leaves Vitex (Vicia sp.); Villus Vicia villosa Roth; Jia Jiazi Vicia cracca L; pea Pisum sativum L ; Vigna sinensis; Crotalaria juncea L; C. speci bilis; Robinia psendacacia L. and Sophora flavrscens Ait. 3 on the pod borer phase morphology in the text detailed description. 4 pod borer occurred in Nanjing throughout the year 5 generations, of which only 4 generations of the first generation of adults emerge in early May, when the soybean is not flowering, larvae parasitic on other legumes, such as acacia, prickly heat, peas and other . Adult spawning in the pod surface industry wool, a few can be produced in the calyx, or basal petioles, after young hatch, crawling in the pod 1-2 hours, in the pus dorsal sunken pods, mature larvae off Pod into the soil cocoon pupation to the fourth or fifth generation of mature larvae (a few pupae can wintering), in late September after another in the soil cocoon winter. Overwintering young children died in large numbers in late March and may be caused by parasitic fungi. Soybean pip bore larvae There are two kinds of parasitic wasps in Nanjing (Cremastau sp. And Microbracon sp.), But the parasitism rate is very low and has no utilization value. 6. Several factors that affect pest-borne insects ① Topography and soil moisture: The damage to the pod borer is high in the lowland. Indoor experiments show that high soil moisture can increase the mortality of the larvae in the soil, especially during the winter,