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虾钳菜日龟甲Cassida japana Baly是农田杂草藜Chenopodium album L.的重要天敌。该虫在江苏地区一年发生4代,以成虫越冬。成虫产卵期一般为16~31 d,每雌产卵量最多为482粒,平均为175粒。各虫态历期因代别而异,卵期3~13d,幼虫期8~16 d,蛹期3~6 d,成虫寿命一般为15~35 d,越冬代成虫寿命长达200余d。该虫全年盛发期在6月中、下旬至8月中旬,发生为害与温度关系密切,高温对其不利。本文选择15科26种植物进行寄主专一性测定,结果表明:虾钳菜日龟甲对藜的嗜食程度很高,并能在藜上完成世代;而其它供试植物不是虾钳菜日龟甲的寄主,因此可以将该虫安全用于杂草藜的生物防治。
Cassida japana Baly is an important natural enemy of crop Chenopodium album L. The insects occur in Jiangsu area four generations a year, with adult wintering. Adult spawning period is generally 16 ~ 31 d, fecundity per female up to 482, an average of 175 grains. The worm stages vary from one generation to another. The oviposition period is 3 to 13 days, larval stage is 8 to 16 days and pupal stage is 3 to 6 days. The adult life span is 15-35 days. The life span of overwintering adults is more than 200 d. The pest insects throughout the year Shengfa period in mid-June, late August to mid-August, the occurrence of harm and temperature are closely related to high temperature adverse. In this paper, the determination of host specificity of 26 species of 15 families was conducted. The results showed that the preference of Penicillaria nivalis to Chenopodium album was very high and could be completed on Quinoa; while the other tested plants were not Tortoise Host, so the insects can be safely used for the biological control of weed quinoa.