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烟草夜蛾是烟区主要害虫之一。据记载国内计有70余种,食性较杂,主要为害烟草、辣椒、棉花、蔓陀蘿和蕃茄等,烟草受害后对产量和品质均有很大影响,一般破损率为30%,重者达70%,临朐烟区1962年被害株率10-30%。一、形态特征1.卵:呈半球形,直径为0.4-0.55毫米,表面有20多条纵隆起线,中间有无数短横线。卵初为乳白色,后渐变黄色,近孵化时呈紫褐色。2.幼虫:刚孵化时体长约一毫米,老熟时长达30毫米左右。体色1-2龄时呈铁锈色,毛瘤明显;三龄后体色有水青、青绿、绿褐、暗绿及红褐五种。一般多为青绿色和绿褐色。幼虫体有背线,两侧有气门上线、气门线各一条。体表多毛瘤,上生细黄毛。青绿色型特征:体绿色,背
Tobacco budworm is one of the major pests in the tobacco area. It has been reported that there are more than 70 species in the country which have more dietary habits and are mainly harmful to tobacco, peppers, cotton, vinegrowers and tomatoes. The damage and yield of tobacco have a great impact on the yield and quality. The average damage rate is 30% Up to 70%, Provisional tobacco smoke area in 1962 killed 10-30%. First, the morphological characteristics 1. Eggs: hemispherical, a diameter of 0.4-0.55 mm, the surface has more than 20 vertical ridge line, the middle of numerous dash. Eggs early milky white, after the gradient yellow, purple hatching near the hatching. 2. larvae: just hatched when the body length of about one millimeter, cooked up to 30 millimeters or so. Body color was rust rust color 1-2, hair tumor obvious; after three age body color with blue, green, green brown, dark green and red brown five. Mostly green and green-brown. Larva body has a back line, on both sides of the valve on the line, the valve line each one. Multi-surface tumor, students fine yellow hair. Turquoise-type features: body green, back