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大突肩瓢虫是广西蔗区中甘蔗绵蚜的主要天敌之一,在南宁一年可完成四代发育,以第三、第四代成虫在蔗地及附近竹林越冬。此种瓢虫各虫态历期为:卵期5～6天,幼虫期10～15天,预蛹及蛹期5～8天,完成一世代发育需36～56天。越冬成虫寿命可达7～9个月。在适宜条件下,一头雌虫一生产卵量为400～700粒,最多达1235粒。冬季采集成虫保护饲养过冬,于次年甘蔗绵蚜发生初期补充散放到蔗地,是利用此瓢虫防治甘蔗绵蚜的一种有效途径。12月下旬以前采集的成虫,用适量肝糖代饲料饲养于14～18℃中,越冬存活率可达80％以上。
Bursaphelenchus xylophilus is one of the main natural enemies of sugarcane aphids in Guangxi sugarcane field. Four generations of development can be completed in Nanning in one year, and the third and fourth generation of adults wintering in the bamboo fields and nearby bamboo forests. The ladybugs of the worm period: 5 to 6 days of eggs, larvae of 10 to 15 days, pre-pupal and pupal 5-8 days to complete the development of a generation to be 36 to 56 days. Overwintering adult life of up to 7 to 9 months. Under suitable conditions, a female egg production of 400 to 700, a maximum of 1235. Winter collection of adult insects to protect the winter feeding, in the following year, sugarcane Aphis gossypii early release added to the sugarcane field, is the use of ladybugs to control sugarcane cotton aphid an effective way. Adult collected before late December, with appropriate amount of glycogen-fed feed at 14 ~ 18 ℃, the survival rate of overwintering up to 80%.