蒼(cang)蠅(ying)(ying)是完全變態的(de)(de)昆蟲(chong)(chong)(chong)(chong)(chong)(chong)，生(sheng)(sheng)(sheng)活(huo)史(shi)(shi)包括：卵、幼(you)蟲(chong)(chong)(chong)(chong)(chong)(chong)、蛹(yong)及成(cheng)蟲(chong)(chong)(chong)(chong)(chong)(chong)4個時(shi)期(qi)。卵孵為(wei)幼(you)蟲(chong)(chong)(chong)(chong)(chong)(chong)，幼(you)蟲(chong)(chong)(chong)(chong)(chong)(chong)通常稱為(wei)蛆。幼(you)蟲(chong)(chong)(chong)(chong)(chong)(chong)蛻皮(pi)2次共有3齡，第(di)三齡幼(you)蟲(chong)(chong)(chong)(chong)(chong)(chong)不(bu)(bu)(bu)蛻皮(pi)即前后收縮而(er)變為(wei)蛹(yong)，由蛹(yong)前端開(kai)一(yi)(yi)(yi)環(huan)裂而(er)羽(yu)化出(chu)成(cheng)蟲(chong)(chong)(chong)(chong)(chong)(chong)。成(cheng)蟲(chong)(chong)(chong)(chong)(chong)(chong)初出(chu)時(shi)，兩(liang)翅(chi)尚未展開(kai)只能(neng)爬行，過(guo)數十分鐘翅(chi)即展開(kai)，開(kai)始飛(fei)行生(sheng)(sheng)(sheng)活(huo)。由卵到成(cheng)蟲(chong)(chong)(chong)(chong)(chong)(chong)所需時(shi)間依(yi)溫度(du)(du)(du)(du)、食物及種類的(de)(de)不(bu)(bu)(bu)同而(er)異。溫度(du)(du)(du)(du)對蒼(cang)蠅(ying)(ying)各蟲(chong)(chong)(chong)(chong)(chong)(chong)期(qi)發(fa)育(yu)(yu)的(de)(de)影(ying)響。據(ju)測定，卵發(fa)育(yu)(yu)的(de)(de)最(zui)低溫度(du)(du)(du)(du)為(wei)10-12℃，最(zui)高(gao)生(sheng)(sheng)(sheng)存溫度(du)(du)(du)(du)為(wei)42℃；幼(you)蟲(chong)(chong)(chong)(chong)(chong)(chong)發(fa)育(yu)(yu)的(de)(de)最(zui)低溫度(du)(du)(du)(du)為(wei)12-14℃，最(zui)高(gao)生(sheng)(sheng)(sheng)存溫度(du)(du)(du)(du)為(wei)46℃；蛹(yong)發(fa)育(yu)(yu)的(de)(de)最(zui)低溫度(du)(du)(du)(du)為(wei)日l1-13℃，最(zui)高(gao)生(sheng)(sheng)(sheng)存溫度(du)(du)(du)(du)為(wei)39℃。人工養(yang)殖時(shi)，幼(you)蟲(chong)(chong)(chong)(chong)(chong)(chong)飼養(yang)溫度(du)(du)(du)(du)以(yi)25一(yi)(yi)(yi)35℃為(wei)宜，低于22℃生(sheng)(sheng)(sheng)長周(zhou)(zhou)期(qi)延長，高(gao)于40℃則幼(you)蟲(chong)(chong)(chong)(chong)(chong)(chong)會從培(pei)養(yang)基(ji)中(zhong)爬出(chu)，尋找陰涼(liang)適溫處。在(zai)恒(heng)溫室（28士1℃）和營養(yang)豐富的(de)(de)條(tiao)件(jian)下(xia)(xia)，蒼(cang)蠅(ying)(ying)的(de)(de)生(sheng)(sheng)(sheng)活(huo)史(shi)(shi)周(zhou)(zhou)期(qi)約需兩(liang)周(zhou)(zhou)。在(zai)自然界，蒼(cang)蠅(ying)(ying)生(sheng)(sheng)(sheng)活(huo)周(zhou)(zhou)期(qi)視季(ji)節(jie)和地(di)區的(de)(de)不(bu)(bu)(bu)同差別很大，據(ju)廣東白水(shui)東鎮觀察(cha)，在(zai)當地(di)的(de)(de)自然條(tiao)件(jian)下(xia)(xia)，蒼(cang)蠅(ying)(ying)生(sheng)(sheng)(sheng)活(huo)史(shi)(shi)周(zhou)(zhou)期(qi)春季(ji)（20.5℃）為(wei)14一(yi)(yi)(yi)18天，夏季(ji)（28.1℃）為(wei)7一(yi)(yi)(yi)9天，秋季(ji)（23.1℃）為(wei)9一(yi)(yi)(yi)15天，冬(dong)季(ji)（16.4℃）為(wei)23一(yi)(yi)(yi)29天。一(yi)(yi)(yi)般情況下(xia)(xia)每完成(cheng)一(yi)(yi)(yi)個世代，需要12一(yi)(yi)(yi)15.5天。

蒼(cang)蠅(ying)卵(luan)(luan)為(wei)乳自(zi)(zi)色，呈香蕉形，長(chang)約1毫(hao)米。卵(luan)(luan)殼的(de)(de)(de)(de)(de)(de)背(bei)面有(you)(you)兩條(tiao)嵴，嵴間的(de)(de)(de)(de)(de)(de)膜最薄，卵(luan)(luan)孵(fu)化(hua)(hua)(hua)時(shi)(shi)殼在(zai)此處裂開，幼蟲鉆(zhan)出。蒼(cang)蠅(ying)卵(luan)(luan)的(de)(de)(de)(de)(de)(de)發(fa)(fa)育(yu)(yu)最低有(you)(you)效溫(wen)(wen)(wen)度(du)(du)為(wei)8一10℃（烏(wu)霍娃，1952）。自(zi)(zi)卵(luan)(luan)產出后至幼蟲孵(fu)化(hua)(hua)(hua)出所需(xu)的(de)(de)(de)(de)(de)(de)時(shi)(shi)間為(wei)卵(luan)(luan)期，卵(luan)(luan)期的(de)(de)(de)(de)(de)(de)長(chang)短(duan)和溫(wen)(wen)(wen)度(du)(du)有(you)(you)關。蠅(ying)卵(luan)(luan)的(de)(de)(de)(de)(de)(de)孵(fu)化(hua)(hua)(hua)溫(wen)(wen)(wen)度(du)(du)范圍為(wei)15一40℃之(zhi)間，35℃時(shi)(shi)最短(duan)，僅需(xu)6一8小時(shi)(shi)；當溫(wen)(wen)(wen)度(du)(du)為(wei)25℃，濕度(du)(du)為(wei)65％時(shi)(shi)，8一12小時(shi)(shi)即可孵(fu)出幼蟲；當溫(wen)(wen)(wen)度(du)(du)低于13℃時(shi)(shi)，蠅(ying)卵(luan)(luan)停止發(fa)(fa)育(yu)(yu)；低于8℃或高(gao)(gao)于42℃時(shi)(shi)，卵(luan)(luan)則死(si)亡。霍新(xin)北報(bao)道(dao)在(zai)自(zi)(zi)然(ran)變溫(wen)(wen)(wen)條(tiao)件下，蒼(cang)蠅(ying)卵(luan)(luan)發(fa)(fa)育(yu)(yu)的(de)(de)(de)(de)(de)(de)起點溫(wen)(wen)(wen)度(du)(du)為(wei)13.46士2.5℃。在(zai)腐爛物質堆中，卵(luan)(luan)發(fa)(fa)育(yu)(yu)時(shi)(shi)期的(de)(de)(de)(de)(de)(de)長(chang)短(duan)，因(yin)溫(wen)(wen)(wen)度(du)(du)不(bu)同而有(you)(you)差異，夏天一般經過(guo)8一12小時(shi)(shi)即可孵(fu)化(hua)(hua)(hua)。濕度(du)(du)對(dui)(dui)蠅(ying)卵(luan)(luan)的(de)(de)(de)(de)(de)(de)孵(fu)化(hua)(hua)(hua)率(lv)也(ye)有(you)(you)很大的(de)(de)(de)(de)(de)(de)影響。蒼(cang)蠅(ying)卵(luan)(luan)的(de)(de)(de)(de)(de)(de)發(fa)(fa)育(yu)(yu)需(xu)要高(gao)(gao)濕，相對(dui)(dui)濕度(du)(du)低于90%的(de)(de)(de)(de)(de)(de)時(shi)(shi)候(hou)率(lv)高(gao)(gao)。蒼(cang)蠅(ying)的(de)(de)(de)(de)(de)(de)卵(luan)(luan)殼對(dui)(dui)于各種(zhong)化(hua)(hua)(hua)合物的(de)(de)(de)(de)(de)(de)抵抗(kang)力(li)比幼蟲的(de)(de)(de)(de)(de)(de)表皮強。