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在武昌,蚕豆象Bruchus rufimanus Boheman每年发生一代,以成虫越冬。成虫必须取食蚕豆花后才能正常交配和产卵。4月为交配盛期。4月中、下旬为产卵盛期,最喜欢把卵产到生长已有1l—20天的嫩蚕豆荚上,但不在豌豆荚上产卵。产卵历期约为9天。4月下旬至5月上旬为孵化盛期。幼虫共四龄,在豆粒内的死亡率随着单个豆粒上侵入孔的增多而增高。8月为化蛹盛期,8月中旬到9月上旬为羽化盛期。羽化出的成虫绝大部分藏在豆粒内越冬。从卵发育到成虫羽化约需120天。成虫寿命一般为212天,最长达295天,但不能度过两个冬季。
In Wuchang, broadleaf plants such as Bruchus rufimanus Boheman occur one generation per year, overwintering their adult worms. Adults must eat fava beans to normal mating and oviposition. April is the peak of mating. In mid-April, late for the spawning period, the most like to produce eggs have grown 1l-20 days have been on the tender broad bean pods, but not on the pea pod spawning. Spawning period of about 9 days. In late April to early May for the incubation period. A total of four instar larvae, the intragranular mortality increased with the number of invaded holes on a single bean. August is the pupation peak, mid-August to early September for the emergence of feathers. The vast majority of adult worms hidden in winter grain beans. From egg development to adult emergence about 120 days. Adult life expectancy is generally 212 days, up to 295 days, but can not spend two winter.