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豆小卷叶蛾是豆类的重要害虫。幼虫卷食芽、叶、花簇,并蛙食莢、粒、嫩茎等部。一般大豆受害,株高減低14—48％,結莢数減少11—27％左右。成虫体色暗褐,翅展16—20毫米。下唇須伸向前方,側視呈三角形。前翅中室外側有一黑斑。M脉在翅基的一段消失,Cu_1自中室下角伸出弯向前方。雌蛾翅韁3条,交配囊体具交配囊片2枚。雄蛾翅韁1条,第八腹节具侧味刷。卵扁薄呈椭圓形,长径0.56—0.75毫米,初产黄白色,在发育阶段卵面依次出現紅色小点。幼虫共5龄,老熟时体长11—14毫米。体青微褐,头部褐色,两侧有黑色楔形纹。腹足趾鈞双序全环,臀櫛5—8齿。蛹褐色,体长7—9毫米,雌蛹生殖孔生于第八和第九腹节,雄者位于第九腹节。此虫在武功地区一年发生4—5代,多以幼虫在土中越冬。越冬代成虫发生于4、5月,第一代多为害草木樨等。第二代发生于6、7月,主要为害春播豆类。第三代发生于8月,主要为害夏播豆类。第四代发生于9、10月,发生較早的为害夏播豆类,迟的为害草木樨和野生豆类等。成虫夜出,飞行力強,对强的灯光和黑光灯有趋性。产卵量与补充营养有密切关系。卵散产于豆株下部叶片背面,幼虫孵化后須爬至上部幼嫩芽叶始能取食生活。已发現寄圭11种,有些生物学特性在防治上可利用。
Bean leaf roller moth is an important pest of beans. Larvae roll buds, leaves, flower clusters, and frog food pods, grain, tender stems and other ministries. General soybean victims, 14-48% reduction in plant height, reduced pod number about 11-27%. Adult body color dark brown, wingspan 16-20 mm. Lower lip should be stretched forward, triangular side view. There is a dark spot on the outside of the forewing. M veins disappeared in the wing base, Cu_1 from the lower corner of the chamber out to bend forward. Female moths winged rein 3, with the exchange of cysts capsular with 2. Male moths winged rein 1, the eighth abdominal section with side brush. Egg thin flat oval, 0.56-0.75 mm in diameter, primiparous yellowish white, in the developmental stages of the egg red dots appear in turn. Larva a total of 5 years old, mature body length 11-14 mm. Body slightly brown, brown head, both sides of the black wedge pattern. Gastro-toe Jun double order full ring, 5-8 teeth incarcoration. Pupa brown, body length 7-9 mm, female pupal reproductive orifice was born in the eighth and ninth abdominal section, the male is located in the ninth abdominal section. This worm occurs in the martial arts area 4-5 generations a year, and more larvae wintering in the soil. Overwintering generation of adults occurred in April and May, the first generation of more harmful plants such as mulberry. The second generation occurred in June and July, the main victims of spring sowing beans. The third generation occurred in August, the main victims of summer sowing beans. The fourth generation occurred in September and October, the earlier occurrence of sowing summer sowing, later sowing damage and wild legumes and other beans. Adult night, flying strong, strong light and black light trend. The amount of spawning and nutritional supplements are closely related. Egg scattered in the back of the lower leaves of bean plants, larvae hatch after climbing to the upper part of young buds can begin to feed on life. Already found 11 kinds of Kyu Kyu, some of the biological characteristics available in the prevention and treatment.