七星瓢(piao)(piao)(piao)蟲(chong)（學名：Coccinella septempunctata）是瓢(piao)(piao)(piao)蟲(chong)科(ke)、瓢(piao)(piao)(piao)蟲(chong)屬昆蟲(chong)。成蟲(chong)體長5.2-6.5毫米，寬(kuan)4.0-5.6毫米；身體卵圓形，背(bei)部(bu)拱起，呈水瓢(piao)(piao)(piao)狀；頭黑(hei)色(se)(se)(se)、復眼黑(hei)色(se)(se)(se)，內側(ce)凹入處(chu)(chu)各(ge)(ge)有(you)一淡黃(huang)(huang)色(se)(se)(se)點(dian)；觸(chu)角(jiao)褐色(se)(se)(se)；口器(qi)黑(hei)色(se)(se)(se)；上(shang)額外側(ce)為黃(huang)(huang)色(se)(se)(se)；前胸背(bei)板黑(hei)，前上(shang)角(jiao)各(ge)(ge)有(you)1個(ge)(ge)較(jiao)大(da)的近方形的淡黃(huang)(huang)地；小盾片(pian)黑(hei)色(se)(se)(se)；鞘(qiao)翅紅色(se)(se)(se)或(huo)橙黃(huang)(huang)色(se)(se)(se)，兩(liang)(liang)側(ce)共有(you)7個(ge)(ge)黑(hei)斑(ban)(ban)，左右兩(liang)(liang)側(ce)各(ge)(ge)有(you)3個(ge)(ge)黑(hei)點(dian)，接合處(chu)(chu)前方尚有(you)一個(ge)(ge)更大(da)的黑(hei)點(dian)；翅基部(bu)在小盾片(pian)兩(liang)(liang)側(ce)各(ge)(ge)有(you)1個(ge)(ge)三(san)角(jiao)形白斑(ban)(ban)；體腹及足黑(hei)色(se)(se)(se)。
七(qi)星瓢蟲(chong)(chong)一(yi)生要經過卵、幼(you)蟲(chong)(chong)、蛹和成(cheng)蟲(chong)(chong)4個不(bu)同發(fa)育階段，各蟲(chong)(chong)態的發(fa)育歷期，主(zhu)要受食物和溫度的影響。七(qi)星瓢蟲(chong)(chong)是(shi)遷(qian)飛性昆蟲(chong)(chong)，成(cheng)蟲(chong)(chong)和幼(you)蟲(chong)(chong)的覓食行為(wei)屬于(yu)廣域(yu)搜索與區(qu)域(yu)集中(zhong)搜索行為(wei)的轉換。七(qi)星瓢蟲(chong)(chong)主(zhu)要以蚜蟲(chong)(chong)為(wei)食，有時還取(qu)食小土粒(li)、真菌孢子(zi)和一(yi)些(xie)小型昆蟲(chong)(chong)，秋天還常(chang)常(chang)取(qu)食植物的花(hua)粉。廣泛分(fen)布于(yu)非洲、歐洲、亞洲。
七星瓢蟲的(de)(de)名稱由其鞘翅上的(de)(de)7個黑(hei)色斑點(dian)而來，但是其身上的(de)(de)斑點(dian)數量(liang)是各不相同的(de)(de)。
七(qi)星瓢(piao)蟲(chong)(chong)(chong)(chong)幼(you)(you)蟲(chong)(chong)(chong)(chong)與異(yi)色(se)瓢(piao)蟲(chong)(chong)(chong)(chong)幼(you)(you)蟲(chong)(chong)(chong)(chong)相(xiang)似。區別在(zai)于七(qi)星瓢(piao)蟲(chong)(chong)(chong)(chong)幼(you)(you)蟲(chong)(chong)(chong)(chong)淡藍灰色(se)，異(yi)色(se)瓢(piao)蟲(chong)(chong)(chong)(chong)幼(you)(you)蟲(chong)(chong)(chong)(chong)灰黑色(se)。七(qi)星瓢(piao)蟲(chong)(chong)(chong)(chong)幼(you)(you)蟲(chong)(chong)(chong)(chong)腹(fu)部背面(mian)和側面(mian)，每節生有(you)六個短刺(ci)(ci)；第一(yi)、四(si)兩(liang)節背面(mian)兩(liang)側，各有(you)一(yi)對黃色(se)短刺(ci)(ci)；其余各節短刺(ci)(ci)皆(jie)為黑色(se)。異(yi)色(se)瓢(piao)蟲(chong)(chong)(chong)(chong)幼(you)(you)蟲(chong)(chong)(chong)(chong)腹(fu)部背面(mian)兩(liang)側，每節生有(you)六個分枝(zhi)的枝(zhi)刺(ci)(ci)，第四(si)兩(liang)節的背面(mian)兩(liang)側，各有(you)一(yi)對桔(jie)紅色(se)枝(zhi)刺(ci)(ci)，其中(zhong)第一(yi)節的兩(liang)個枝(zhi)刺(ci)(ci)基部相(xiang)連(lian)，形成一(yi)個桔(jie)紅色(se)大斑。
某(mou)些(xie)金花蟲(chong)類的(de)卵，如柳(liu)(liu)葉(xie)(xie)甲的(de)卵和七星(xing)(xing)瓢(piao)蟲(chong)的(de)卵很(hen)相似，常(chang)被誤認為七星(xing)(xing)瓢(piao)蟲(chong)卵，但兩者(zhe)是有明顯區(qu)別(bie)的(de)：①兩者(zhe)產(chan)(chan)卵習(xi)性不同(tong)，柳(liu)(liu)葉(xie)(xie)甲常(chang)在柳(liu)(liu)葉(xie)(xie)上產(chan)(chan)卵，而(er)(er)七星(xing)(xing)瓢(piao)蟲(chong)通常(chang)不在樹葉(xie)(xie)上產(chan)(chan)卵；②柳(liu)(liu)葉(xie)(xie)甲卵粒(li)是長(chang)圓形，卵塊排(pai)列疏松而(er)(er)不整(zheng)(zheng)齊，七星(xing)(xing)瓢(piao)蟲(chong)的(de)卵粒(li)是梭形，排(pai)列緊密而(er)(er)整(zheng)(zheng)齊。
七星瓢(piao)蟲廣(guang)泛分布(bu)于北(bei)美洲(zhou)、歐洲(zhou)、亞洲(zhou)。在中國分布(bu)于東北(bei)、華(hua)北(bei)、華(hua)中、西(xi)北(bei)、華(hua)東和(he)西(xi)南地區。
中文名 拉(la)丁(ding)學(xue)名 命名者(zhe)及年代
七星瓢(piao)蟲日本(ben)亞種 Coccinella septempunctata brucki Mulsant，1866
七(qi)星瓢蟲指(zhi)名(ming)亞種 Coccinella septempunctata septempunctata Linnaeus，1758
七星瓢蟲(chong)體長5.2-7.0毫(hao)米，寬4.0-5.6毫(hao)米。蟲(chong)體卵圓形，背(bei)面光滑(hua)并拱超呈半球狀。剛羽化的(de)成(cheng)蟲(chong)柔軟，嫩黃色(se)(se)(se)，2-3小時(shi)后，整個體軀和鞘(qiao)翅變硬，顏(yan)色(se)(se)(se)由黃變紅，同時(shi)鞘(qiao)翅上出(chu)現7個黑(hei)色(se)(se)(se)斑點。
七(qi)星(xing)瓢蟲(chong)和其它昆蟲(chong)一(yi)(yi)樣，體(ti)(ti)軀(qu)分(fen)為頭、胸(xiong)、腹(fu)三部(bu)(bu)分(fen)。各部(bu)(bu)分(fen)均由若干個(ge)體(ti)(ti)節(jie)(jie)組成(cheng)。頭部(bu)(bu)生(sheng)有(you)(you)一(yi)(yi)對(dui)觸角(jiao)，一(yi)(yi)對(dui)復眼(yan)和口(kou)器(qi)，口(kou)器(qi)兩側(ce)(ce)有(you)(you)一(yi)(yi)對(dui)下(xia)顎(e)須。頭部(bu)(bu)較小，經常后(hou)(hou)縮在(zai)發達的(de)(de)(de)(de)前胸(xiong)背板之(zhi)下(xia)，胸(xiong)部(bu)(bu)生(sheng)有(you)(you)兩對(dui)翅(chi)，三對(dui)足(zu)。腹(fu)部(bu)(bu)八節(jie)(jie)，但腹(fu)面只能看到6一(yi)(yi)7節(jie)(jie)。腹(fu)部(bu)(bu)末端有(you)(you)外生(sheng)殖器(qi)和肛(gang)門。胸(xiong)部(bu)(bu)和腹(fu)部(bu)(bu)側(ce)(ce)面生(sheng)有(you)(you)氣(qi)孔，是呼(hu)吸時(shi)氣(qi)體(ti)(ti)進出的(de)(de)(de)(de)通(tong)道，七(qi)星(xing)瓢蟲(chong)和許多有(you)(you)硬(ying)翅(chi)鞘(qiao)(qiao)的(de)(de)(de)(de)昆蟲(chong)（分(fen)類學上稱鞘(qiao)(qiao)翅(chi)目(mu)）一(yi)(yi)樣，有(you)(you)一(yi)(yi)對(dui)角(jiao)質堅硬(ying)的(de)(de)(de)(de)前翅(chi)。平(ping)時(shi)，這一(yi)(yi)對(dui)的(de)(de)(de)(de)翅(chi)并合，覆蓋(gai)在(zai)胸(xiong)腹(fu)部(bu)(bu)的(de)(de)(de)(de)背上。后(hou)(hou)翅(chi)為半(ban)透(tou)明的(de)(de)(de)(de)膜質，平(ping)時(shi)折疊，匿(ni)于前翅(chi)之(zhi)下(xia)。七(qi)星(xing)瓢蟲(chong)的(de)(de)(de)(de)下(xia)顎(e)須末節(jie)(jie)呈斧狀，足(zu)的(de)(de)(de)(de)咐節(jie)(jie)是四節(jie)(jie)，但第(di)三節(jie)(jie)特(te)別(bie)小，并匿(ni)于第(di)二節(jie)(jie)的(de)(de)(de)(de)兩個(ge)分(fen)葉之(zhi)間，粗(cu)看很象是三節(jie)(jie)。
七星(xing)瓢蟲雌雄(xiong)形態，斑紋相同，雌蟲常較(jiao)雄(xiong)蟲大些。兩(liang)者(zhe)可靠的鑒別(bie)特征(zheng)是雄(xiong)蟲腹(fu)部(bu)腹(fu)面末(mo)端，有(you)一小(xiao)的橫的凹陷，而雌蟲則(ze)平坦而光滑，無此凹陷。
七星瓢蟲幼(you)蟲體表有(you)一(yi)(yi)層較堅硬(ying)的表皮(pi)(pi)，它的伸(shen)展性(xing)有(you)限，所(suo)以(yi)生長到一(yi)(yi)定階段，必須蛻(tui)去老皮(pi)(pi)，著生新(xin)皮(pi)(pi)，才能繼(ji)續成長。每蛻(tui)一(yi)(yi)次(ci)皮(pi)(pi)，就增加(jia)一(yi)(yi)個(ge)齡(ling)期，幼(you)蟲共蛻(tui)三次(ci)皮(pi)(pi)，有(you)四個(ge)齡(ling)期。初孵(fu)幼(you)蟲（一(yi)(yi)齡(ling)）身體很小，只(zhi)有(you)2-3毫米，孵(fu)化后(hou)，就聚集在(zai)原卵(luan)塊(kuai)的殘殼上，約經(jing)8-12小時，開始分散(san)取食。約兩(liang)天后(hou)，蛻(tui)皮(pi)(pi)變為(wei)二(er)齡(ling)，此(ci)時體長已增大一(yi)(yi)倍多，腹部第一(yi)(yi)節(jie)背面(mian)兩(liang)側(ce)，出現兩(liang)個(ge)黃色肉(rou)瘤(liu)(liu)，三齡(ling)幼(you)蟲除體長加(jia)大外，腹部第一(yi)(yi)、四兩(liang)節(jie)的背面(mian)兩(liang)側(ce)，各有(you)一(yi)(yi)對(dui)(dui)黃色肉(rou)瘤(liu)(liu)，但第四節(jie)的肉(rou)瘤(liu)(liu)不很明顯(xian)，要用放大鏡才能看清楚，到四齡(ling)時，這兩(liang)對(dui)(dui)肉(rou)瘤(liu)(liu)都非常明顯(xian)。當(dang)幼(you)蟲老熟(shu)時，體形變粗，最后(hou)以(yi)尾端固著在(zai)植株(zhu)等(deng)附著物上，準備化蛹(yong)。
體長(chang)7毫米，寬5毫米。體黃色。前(qian)胸(xiong)背(bei)(bei)(bei)板前(qian)緣(yuan)有(you)(you)(you)4個(ge)黑點，中央2個(ge)呈三角(jiao)形，前(qian)胸(xiong)背(bei)(bei)(bei)板后緣(yuan)中央有(you)(you)(you)2個(ge)黑點，兩(liang)側角(jiao)有(you)(you)(you)2個(ge)黑斑。中胸(xiong)背(bei)(bei)(bei)板有(you)(you)(you)2個(ge)黑斑。腹部第2-6節(jie)背(bei)(bei)(bei)面左(zuo)右有(you)(you)(you)4個(ge)黑斑。腹末(mo)帶(dai)有(you)(you)(you)末(mo)齡幼蟲的黑色蛻皮。
七星(xing)瓢(piao)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)的下(xia)顎須(xu)(xu)是它的主要觸(chu)覺和嗅(xiu)覺器(qi)官。七星(xing)瓢(piao)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)經(jing)常(chang)(chang)在(zai)蚜(ya)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)的寄(ji)主植物(wu)上(shang)(shang)爬動、搜索，當下(xia)顎須(xu)(xu)觸(chu)到蚜(ya)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)時，能迅速地用上(shang)(shang)顎咬(yao)住(zhu)，將蚜(ya)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)吞食(shi)。如果下(xia)顎須(xu)(xu)沒有觸(chu)到，即使蚜(ya)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)就在(zai)它的眼前，似乎也不能發現。七星(xing)瓢(piao)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)成蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)和幼蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)雖都(dou)取(qu)食(shi)蚜(ya)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)，但因蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)態不同(tong)，口(kou)(kou)器(qi)結構(gou)不同(tong)，取(qu)食(shi)方(fang)法(fa)也有差別(bie)。成蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)取(qu)食(shi)時，通常(chang)(chang)將蚜(ya)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)咬(yao)住(zhu)，經(jing)過口(kou)(kou)器(qi)的簡(jian)單咀(ju)嚼后，將蚜(ya)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)軀(qu)體、附肢(zhi)等完全吞下(xia)。大(da)(da)齡幼蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)取(qu)食(shi)基本上(shang)(shang)和成蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)一(yi)樣。但初齡幼蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)因口(kou)(kou)器(qi)小(xiao)，吞食(shi)力差，取(qu)食(shi)時常(chang)(chang)在(zai)蚜(ya)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)體上(shang)(shang)咬(yao)一(yi)個孔，吸食(shi)汁液，最后留(liu)下(xia)蚜(ya)體殘(can)殼。一(yi)頭七星(xing)瓢(piao)蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)的成蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)，平均一(yi)天吃棉蚜(ya)100-120頭，吃菜(cai)蚜(ya)147頭，吃杏蚜(ya)59頭。幼蟲(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)(chong)食(shi)蚜(ya)量則因齡期(qi)的大(da)(da)小(xiao)而不同(tong)，齡期(qi)小(xiao)吃的少(shao)，齡期(qi)大(da)(da)吃的多。
七星瓢蟲(chong)(chong)有吃卵和互(hu)相捕食(shi)的(de)習(xi)性。在(zai)食(shi)物(wu)不(bu)足(zu)的(de)情況下，七星瓢蟲(chong)(chong)成蟲(chong)(chong)很(hen)容易(yi)吃掉(diao)已產下的(de)卵塊。即使有充足(zu)的(de)蚜蟲(chong)(chong)，它們也喜歡(huan)吃卵；幼(you)蟲(chong)(chong)則(ze)常(chang)互(hu)相捕食(shi)。同一(yi)卵塊早孵(fu)出的(de)個體，常(chang)吃掉(diao)尚未(wei)孵(fu)化的(de)卵粒(li)。大齡幼(you)蟲(chong)(chong)常(chang)吃掉(diao)小齡幼(you)蟲(chong)(chong)。蛹也常(chang)被成蟲(chong)(chong)和大齡幼(you)蟲(chong)(chong)吃掉(diao)。
七(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)(chong)(chong)雖(sui)然(ran)主(zhu)要(yao)是吃(chi)蚜蟲(chong)(chong)(chong)(chong)(chong)，但并(bing)不(bu)僅僅限于以蚜蟲(chong)(chong)(chong)(chong)(chong)為食(shi)。中國北京的金山腳(jiao)下，在秋天(tian)蒿草(cao)和荊條上(shang)并(bing)沒有蚜蟲(chong)(chong)(chong)(chong)(chong)，七(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)(chong)(chong)成蟲(chong)(chong)(chong)(chong)(chong)卻(que)群(qun)集其上(shang)，數量很多。經過仔細觀(guan)察和消化道解(jie)削并(bing)在顯微鏡(jing)下檢查，發(fa)現七(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)(chong)(chong)在早春不(bu)僅吃(chi)蚜蟲(chong)(chong)(chong)(chong)(chong)，還取食(shi)小土粒、真菌孢(bao)子和一些小型昆蟲(chong)(chong)(chong)(chong)(chong)。秋天(tian)，七(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)(chong)(chong)則常常取食(shi)植(zhi)物(wu)的花(hua)粉。
七(qi)星(xing)瓢(piao)(piao)蟲(chong)(chong)一生經過卵、幼蟲(chong)(chong)、蛹、成(cheng)蟲(chong)(chong)等四個發(fa)育階段。七(qi)星(xing)瓢(piao)(piao)蟲(chong)(chong)各蟲(chong)(chong)態的(de)(de)發(fa)育歷期，主要受食(shi)物和溫(wen)(wen)度(du)的(de)(de)影(ying)(ying)響(xiang)。在適宜(yi)的(de)(de)食(shi)物條(tiao)件下，溫(wen)(wen)度(du)不同(tong)，發(fa)育的(de)(de)速(su)(su)率(lv)也(ye)不相同(tong)。幼蟲(chong)(chong)期在15℃條(tiao)件下，長達44.1天，而(er)在24-26℃時(shi)(shi)只有8-9.4天。高于(yu)30℃發(fa)育速(su)(su)率(lv)又逐漸降低，33℃時(shi)(shi)幼蟲(chong)(chong)期又延長到16.2天。溫(wen)(wen)度(du)不適宜(yi)時(shi)(shi)發(fa)育緩慢(man)的(de)(de)原(yuan)因，除(chu)直接受溫(wen)(wen)度(du)影(ying)(ying)響(xiang)外，取(qu)食(shi)速(su)(su)率(lv)低也(ye)有關系。一頭四齡幼蟲(chong)(chong)在25℃左右時(shi)(shi)，每天取(qu)食(shi)一百多(duo)頭蚜(ya)蟲(chong)(chong)，而(er)在15℃時(shi)(shi)，僅取(qu)食(shi)十幾(ji)頭。
七星瓢蟲(chong)以成(cheng)蟲(chong)越(yue)冬，多選(xuan)擇較干燥、溫(wen)(wen)暖的(de)(de)枯枝落葉下、雜草基(ji)部(bu)近地面的(de)(de)土塊下、土縫中、樹皮裂縫處潛伏，蟄(zhe)伏越(yue)冬后(hou)，若遇溫(wen)(wen)度回(hui)暖，又爬出越(yue)冬場(chang)所活動。出蟄(zhe)后(hou)的(de)(de)七星瓢蟲(chong)迅速在林木、雜草和作(zuo)物(wu)(wu)之間(jian)活動，特(te)別是帶蚜蟲(chong)的(de)(de)作(zuo)物(wu)(wu)與(yu)開花果木上。七星瓢蟲(chong)是遷飛(fei)性昆(kun)蟲(chong)，成(cheng)蟲(chong)和幼蟲(chong)的(de)(de)覓食行為(wei)(wei)屬于廣域(yu)搜(sou)(sou)索與(yu)區域(yu)集(ji)中搜(sou)(sou)索行為(wei)(wei)的(de)(de)轉換(huan)。
七(qi)星瓢(piao)蟲有著驚人(ren)的避敵(di)本領。只要(yao)有天敵(di)來擾或受到(dao)(dao)外界突然(ran)的刺激，它(ta)就會發生一種(zhong)(zhong)(zhong)(zhong)叫做“神經休克(ke)”現(xian)象，有點(dian)像(xiang)失(shi)去知(zhi)覺似的一動不(bu)動。“休克(ke)”過后(hou)，受到(dao)(dao)刺激的神經系統恢復(fu)正常，它(ta)又(you)清(qing)醒過來，開始爬行。這種(zhong)(zhong)(zhong)(zhong)“死(si)(si)去活(huo)來”的舉止，人(ren)們稱它(ta)“假死(si)(si)”。如果用手去捏它(ta)，它(ta)就會使(shi)出第二(er)招避敵(di)本領，在(zai)它(ta)6條足上的各(ge)關節中間，滲出一種(zhong)(zhong)(zhong)(zhong)黃色汁液來，這些汁液散發出來的辣(la)臭味，可使(shi)人(ren)聞之感到(dao)(dao)膩煩，就連鳥類(lei)聞到(dao)(dao)這種(zhong)(zhong)(zhong)(zhong)怪(guai)味，也“退避三舍(she)”。
七(qi)(qi)(qi)(qi)(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)在(zai)(zai)不同季節(jie)的(de)(de)活動場所不一(yi)樣。冬天，七(qi)(qi)(qi)(qi)(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)在(zai)(zai)小麥(mai)和油菜的(de)(de)根莖(jing)間越冬，也有的(de)(de)在(zai)(zai)向陽的(de)(de)土塊、土縫中過冬。春天，一(yi)旦氣溫(wen)升(sheng)到(dao)10℃以上，越冬的(de)(de)七(qi)(qi)(qi)(qi)(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)就蘇醒過來，開(kai)始(shi)活動，在(zai)(zai)麥(mai)類和油菜植(zhi)物(wu)(wu)株上能找到(dao)它(ta)。夏(xia)天，隨(sui)著氣溫(wen)升(sheng)高和食(shi)物(wu)(wu)增多(duo)，七(qi)(qi)(qi)(qi)(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)大(da)量繁殖，凡是有蚜蟲(chong)(chong)(chong)和蚧蟲(chong)(chong)(chong)寄生的(de)(de)植(zhi)物(wu)(wu)，如(ru)棉花、柳(liu)樹、槐(huai)樹、榆樹、豆類等植(zhi)株上，都能找到(dao)七(qi)(qi)(qi)(qi)(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)，有時(shi)甚至出(chu)現(xian)(xian)大(da)批七(qi)(qi)(qi)(qi)(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)聚集的(de)(de)景象。秋天，田間七(qi)(qi)(qi)(qi)(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)的(de)(de)數量減少(shao)，它(ta)常在(zai)(zai)玉米、蘿卜和白菜等處(chu)產卵，這時(shi)候(hou)，早(zao)晚的(de)(de)氣溫(wen)較低，七(qi)(qi)(qi)(qi)(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)往往隱蔽(bi)起(qi)來，不易(yi)發(fa)現(xian)(xian)，需在(zai)(zai)上午7點鐘(zhong)以后至太陽下山之前(qian)采集。
越冬的(de)(de)七(qi)(qi)星(xing)(xing)瓢(piao)(piao)蟲(chong)不食不動，只要找到(dao)，捕(bu)捉很方便，用(yong)(yong)手就能捉住。其他季節的(de)(de)七(qi)(qi)星(xing)(xing)瓢(piao)(piao)蟲(chong)善爬能飛，可以利用(yong)(yong)它假死習性，用(yong)(yong)塑料袋迅速套(tao)住棲(qi)息著(zhu)七(qi)(qi)星(xing)(xing)瓢(piao)(piao)蟲(chong)的(de)(de)枝條，抖動一下，七(qi)(qi)星(xing)(xing)瓢(piao)(piao)蟲(chong)立即掉落在(zai)袋里(li)，接著(zhu)，把枝條抽(chou)出(chu)，扎緊口袋，就可以帶回實驗(yan)室。
人(ren)工飼養(yang)(yang)(yang)七星(xing)瓢(piao)(piao)蟲(chong)(chong)(chong)(chong)，首先要解(jie)決飼料(liao)問題。可(ke)以到野外采(cai)集天(tian)然飼料(liao)蚜(ya)蟲(chong)(chong)(chong)(chong)，但這種方法費工多(duo)，有時(shi)還不(bu)易采(cai)到。所以用(yong)人(ren)工培養(yang)(yang)(yang)大(da)量蚜(ya)蟲(chong)(chong)(chong)(chong)，滿足七星(xing)瓢(piao)(piao)蟲(chong)(chong)(chong)(chong)食用(yong)。可(ke)用(yong)蠶(can)豆苗(miao)(miao)人(ren)工培養(yang)(yang)(yang)蚜(ya)蟲(chong)(chong)(chong)(chong)。當(dang)分(fen)栽的蠶(can)豆苗(miao)(miao)長出3-4厘米高時(shi)，把野外采(cai)集的少量蚜(ya)蟲(chong)(chong)(chong)(chong)放在豆苗(miao)(miao)上，在室溫20-30℃、相(xiang)對濕度60-70%的條件下培養(yang)(yang)(yang)10-15天(tian)，蚜(ya)蟲(chong)(chong)(chong)(chong)就能大(da)量繁殖，這時(shi)就可(ke)用(yong)蚜(ya)蟲(chong)(chong)(chong)(chong)作七星(xing)瓢(piao)(piao)蟲(chong)(chong)(chong)(chong)的飼料(liao)。
將蛹或成蟲(chong)放(fang)入(ru)成蟲(chong)飼(si)養籠(long)(long)(long)內(nei)(nei)，每(mei)籠(long)(long)(long)放(fang)雌(ci)蟲(chong)500-750頭，并搭配1/4的(de)(de)雄(xiong)蟲(chong)。成蟲(chong)喂(wei)人(ren)工飼(si)料或蚜蟲(chong)，每(mei)天(tian)喂(wei)飼(si)料和(he)加水。新羽(yu)化的(de)(de)成蟲(chong)，經過幾天(tian)的(de)(de)取食，逐步達到性成熟，便交尾產(chan)卵(luan)(luan)。產(chan)卵(luan)(luan)時間(jian)多在晚上7-9點(dian)鐘。卵(luan)(luan)產(chan)在籠(long)(long)(long)頂和(he)內(nei)(nei)側(ce)的(de)(de)紙(zhi)上，收(shou)卵(luan)(luan)時，將籠(long)(long)(long)內(nei)(nei)的(de)(de)紙(zhi)取出(chu)，換上新鮮的(de)(de)紙(zhi)就成了(le)。收(shou)卵(luan)(luan)每(mei)天(tian)1-2次，同時換飼(si)料和(he)水。收(shou)卵(luan)(luan)時先準備一批(pi)空飼(si)養籠(long)(long)(long)，籠(long)(long)(long)底打開，頂面向(xiang)光，然后將有蟲(chong)的(de)(de)籠(long)(long)(long)底面紗布拆開，籠(long)(long)(long)底對(dui)準籠(long)(long)(long)底，成蟲(chong)馬上向(xiang)有光的(de)(de)方向(xiang)集中，進(jin)入(ru)新的(de)(de)籠(long)(long)(long)內(nei)(nei)。
成(cheng)蟲飼(si)養時，如食(shi)料不足，就不產卵。成(cheng)蟲在(zai)黑暗條(tiao)件下活(huo)躍，晚(wan)上可適(shi)當加光照，減少(shao)成(cheng)蟲活(huo)動，避免(mian)相互碰傷。
七(qi)(qi)星瓢(piao)蟲(chong)(chong)大(da)量(liang)繁(fan)殖后，可(ke)(ke)以(yi)放(fang)(fang)到田(tian)間，幫助人類消滅(mie)蚜(ya)蟲(chong)(chong)和(he)(he)蚧蟲(chong)(chong)。如棉田(tian)出現大(da)量(liang)蚜(ya)蟲(chong)(chong)危害，這(zhe)時(shi)(shi)(shi)可(ke)(ke)以(yi)把七(qi)(qi)星瓢(piao)蟲(chong)(chong)散(san)放(fang)(fang)到棉田(tian)里，它就能(neng)將蚜(ya)蟲(chong)(chong)吃(chi)掉。散(san)發時(shi)(shi)(shi)，在棉田(tian)邊走邊放(fang)(fang)七(qi)(qi)星瓢(piao)蟲(chong)(chong)，走幾步放(fang)(fang)幾只，以(yi)求(qiu)散(san)放(fang)(fang)均(jun)勻：①掌握好散(san)放(fang)(fang)時(shi)(shi)(shi)間，以(yi)傍(bang)晚(wan)時(shi)(shi)(shi)散(san)放(fang)(fang)為宜。因為傍(bang)晚(wan)氣溫較(jiao)低，光線較(jiao)暗，七(qi)(qi)星瓢(piao)蟲(chong)(chong)活動性較(jiao)弱(ruo)，不易遷(qian)(qian)飛(fei)；②采用(yong)成蟲(chong)(chong)和(he)(he)幼蟲(chong)(chong)混(hun)放(fang)(fang)。因為幼蟲(chong)(chong)沒有(you)遷(qian)(qian)飛(fei)能(neng)力，不會逃逸，而它也有(you)吃(chi)蚜(ya)蟲(chong)(chong)的本領；③散(san)發前一天(tian)停止喂食，再(zai)進行散(san)放(fang)(fang)，可(ke)(ke)以(yi)降低七(qi)(qi)星瓢(piao)蟲(chong)(chong)遷(qian)(qian)飛(fei)活動能(neng)力；④散(san)放(fang)(fang)后兩天(tian)內，不進行中耕(geng)和(he)(he)其他田(tian)間管理，以(yi)免使七(qi)(qi)星瓢(piao)蟲(chong)(chong)受驚(jing)遷(qian)(qian)逃。
七(qi)星瓢(piao)蟲卵(luan)通常成塊地(di)產在(zai)莖(jing)葉(xie)或土塊上。卵(luan)粒(li)梭形，豎立，整齊地(di)排列成塊。每個卵(luan)塊一般(ban)30粒(li)左右。最多可達百余粒(li)，少的則僅有(you)幾(ji)粒(li)。剛產下的卵(luan)淡黃色(se)，后逐漸變為杏黃色(se)。將孵化(hua)時(shi)，呈黑渴色(se)。
新羽化(hua)的七(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)成蟲(chong)(chong)(chong)，待體(ti)軀(qu)和翅鞘硬(ying)化(hua)后(hou)(hou)，便開始(shi)活(huo)動取食(shi)，3-4天(tian)(tian)(tian)后(hou)(hou)交(jiao)尾。七(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)有(you)多(duo)次交(jiao)尾習性，但(dan)(dan)經一(yi)次交(jiao)尾，雌蟲(chong)(chong)(chong)所產(chan)(chan)(chan)的卵就(jiu)(jiu)都能孵化(hua)。秋季(ji)越冬代成蟲(chong)(chong)(chong)交(jiao)尾后(hou)(hou)，雖(sui)活(huo)動取食(shi)，但(dan)(dan)卵巢并不發(fa)育，翌春(chun)活(huo)動取食(shi)后(hou)(hou)才開始(shi)產(chan)(chan)(chan)卵。非越冬代成蟲(chong)(chong)(chong)交(jiao)尾3-5天(tian)(tian)(tian)后(hou)(hou)，便開始(shi)產(chan)(chan)(chan)卵。產(chan)(chan)(chan)卵開始(shi)以后(hou)(hou)，幾(ji)天(tian)(tian)(tian)內就(jiu)(jiu)達到了高峰，產(chan)(chan)(chan)卵盛期(qi)持(chi)續(xu)一(yi)個月(yue)左(zuo)右。在盛期(qi)的33天(tian)(tian)(tian)里(li)，產(chan)(chan)(chan)下了全部卵粒(li)的95%以上。產(chan)(chan)(chan)卵盛期(qi)，一(yi)頭雌蟲(chong)(chong)(chong)一(yi)天(tian)(tian)(tian)可產(chan)(chan)(chan)好幾(ji)個卵塊(kuai)。七(qi)星(xing)瓢(piao)蟲(chong)(chong)(chong)因取食(shi)的蚜(ya)蟲(chong)(chong)(chong)種類不同，產(chan)(chan)(chan)卵量大小(xiao)也不同。取食(shi)它喜歡(huan)(huan)吃的蚜(ya)蟲(chong)(chong)(chong)時，產(chan)(chan)(chan)卵量就(jiu)(jiu)大，取食(shi)不害歡(huan)(huan)吃的蚜(ya)蟲(chong)(chong)(chong)時，產(chan)(chan)(chan)卵量就(jiu)(jiu)小(xiao)。
七(qi)星瓢(piao)蟲(chong)(chong)卵(luan)期(qi)長短(duan)和溫度(du)有關系，當16-17℃時，卵(luan)期(qi)8天，24-26℃時，卵(luan)期(qi)僅2-3天。七(qi)星瓢(piao)蟲(chong)(chong)成(cheng)蟲(chong)(chong)壽命因世代不同而(er)有較(jiao)大差異。越冬(dong)代成(cheng)蟲(chong)(chong)壽命一般都較(jiao)長，可達(da)8-10個(ge)月(yue)，非越冬(dong)代成(cheng)蟲(chong)(chong)一般可活2-3個(ge)月(yue)。
七(qi)星(xing)瓢蟲(chong)(chong)的(de)生殖(zhi)(zhi)滯育(yu)(yu)突出地表現于(yu)2個方面：①種(zhong)群中產(chan)(chan)卵(luan)(luan)雌(ci)蟲(chong)(chong)所(suo)(suo)占(zhan)的(de)比例，簡(jian)稱為產(chan)(chan)卵(luan)(luan)率，無滯育(yu)(yu)時(shi)(shi)達100%；如越冬后蚜(ya)蟲(chong)(chong)充足時(shi)(shi)便(bian)是如此。而(er)其(qi)第(di)二代(dai)則因有生殖(zhi)(zhi)滯育(yu)(yu)，產(chan)(chan)卵(luan)(luan)率下降。②成(cheng)蟲(chong)(chong)羽化后產(chan)(chan)卵(luan)(luan)前期延長的(de)程(cheng)度，這主要(yao)由卵(luan)(luan)巢發(fa)育(yu)(yu)緩慢或暫時(shi)(shi)停頓所(suo)(suo)造(zao)成(cheng)。顯(xian)示出這種(zhong)差異的(de)是雌(ci)蟲(chong)(chong)。而(er)雄(xiong)蟲(chong)(chong)在滯育(yu)(yu)期間其(qi)行(xing)為、趨(qu)性和生殖(zhi)(zhi)附腺(xian)的(de)分泌活(huo)動雖與生殖(zhi)(zhi)期有所(suo)(suo)不同(tong)，但(dan)仍可交尾(wei)，睪丸中有成(cheng)熟精子(zi)。雌(ci)蟲(chong)(chong)滯育(yu)(yu)時(shi)(shi)卵(luan)(luan)巢管停止于(yu)原卵(luan)(luan)區階段，濾泡不進行(xing)發(fa)育(yu)(yu)。這時(shi)(shi)咽(yan)側體及其(qi)細胞體積均小，無合成(cheng)保幼(you)激素的(de)活(huo)性。體內(nei)積累較多的(de)營(ying)養物(wu)質(zhi)，脂肪體雖很發(fa)達，但(dan)不合成(cheng)卵(luan)(luan)黃原蛋(dan)白(bai)。
早春(chun)田(tian)間采集的(de)(de)越(yue)冬代七星瓢(piao)蟲，因(yin)其發育階段不同，一般(ban)采回飼(si)養1-7天后即(ji)開始產(chan)卵(luan)(luan)(luan)(luan)(luan)。瓢(piao)蟲產(chan)卵(luan)(luan)(luan)(luan)(luan)沒有(you)(you)固定的(de)(de)時間，產(chan)卵(luan)(luan)(luan)(luan)(luan)的(de)(de)地點也沒有(you)(you)嚴格的(de)(de)選擇(ze)性，在(zai)盒(he)(he)(he)壁及植物(wu)(wu)上(shang)都可產(chan)卵(luan)(luan)(luan)(luan)(luan)，為了集卵(luan)(luan)(luan)(luan)(luan)的(de)(de)方便(bian)，可以裁(cai)一長22厘米(mi)、寬5厘米(mi)的(de)(de)薄紙(zhi)(zhi)(zhi)，卷成紙(zhi)(zhi)(zhi)筒(tong)，襯(chen)在(zai)紙(zhi)(zhi)(zhi)盒(he)(he)(he)內(nei)或玻(bo)璃器(qi)內(nei)，使其盡(jin)量緊(jin)貼(tie)在(zai)紙(zhi)(zhi)(zhi)盒(he)(he)(he)內(nei)壁，這樣(yang)卵(luan)(luan)(luan)(luan)(luan)多(duo)產(chan)在(zai)襯(chen)紙(zhi)(zhi)(zhi)上(shang)。采卵(luan)(luan)(luan)(luan)(luan)時，可將(jiang)襯(chen)紙(zhi)(zhi)(zhi)取(qu)出，將(jiang)有(you)(you)卵(luan)(luan)(luan)(luan)(luan)粒(li)部(bu)位的(de)(de)紙(zhi)(zhi)(zhi)剪下，放另外的(de)(de)空紙(zhi)(zhi)(zhi)盒(he)(he)(he)中(zhong)，然后再(zai)用(yong)紙(zhi)(zhi)(zhi)片(pian)補好(hao)襯(chen)紙(zhi)(zhi)(zhi)，仍放盒(he)(he)(he)內(nei)再(zai)用(yong)。取(qu)卵(luan)(luan)(luan)(luan)(luan)時應(ying)仔細檢查盒(he)(he)(he)內(nei)植物(wu)(wu)上(shang)有(you)(you)無卵(luan)(luan)(luan)(luan)(luan)粒(li)，特別在(zai)氣候(hou)干燥(zao)時，植物(wu)(wu)常(chang)常(chang)干縮，卵(luan)(luan)(luan)(luan)(luan)粒(li)常(chang)隱藏其中(zhong)，如(ru)發現(xian)卵(luan)(luan)(luan)(luan)(luan)粒(li)，應(ying)將(jiang)帶有(you)(you)卵(luan)(luan)(luan)(luan)(luan)粒(li)的(de)(de)部(bu)位剪下。如(ru)果用(yong)瓶養，瓢(piao)蟲卵(luan)(luan)(luan)(luan)(luan)產(chan)在(zai)瓶壁上(shang)，取(qu)卵(luan)(luan)(luan)(luan)(luan)時可用(yong)毛(mao)筆沾(zhan)少許清水，將(jiang)卵(luan)(luan)(luan)(luan)(luan)濕潤，經數秒鐘后，再(zai)用(yong)毛(mao)筆尖輕(qing)輕(qing)將(jiang)卵(luan)(luan)(luan)(luan)(luan)撥(bo)下，放在(zai)涂(tu)有(you)(you)少許稀漿糊的(de)(de)紙(zhi)(zhi)(zhi)上(shang)，只要卵(luan)(luan)(luan)(luan)(luan)粒(li)保持完整(zheng)，仍然正常(chang)孵化。但(dan)這樣(yang)取(qu)卵(luan)(luan)(luan)(luan)(luan)，很難保證全部(bu)卵(luan)(luan)(luan)(luan)(luan)粒(li)完整(zheng)無損，且操(cao)作費時，因(yin)此(ci)在(zai)大規模(mo)飼(si)養瓢(piao)蟲寸(cun)，仍以紙(zhi)(zhi)(zhi)盒(he)(he)(he)為宜。
瓢蟲成蟲有取(qu)食卵(luan)(luan)粒(li)的習性，產卵(luan)(luan)后，應及時將卵(luan)(luan)粒(li)取(qu)走。每(mei)日取(qu)卵(luan)(luan)的時間(jian)，可結合兩次(ci)喂食同時進行，邊(bian)換飼料、邊(bian)取(qu)卵(luan)(luan)。產卵(luan)(luan)高峰期，最好能每(mei)日取(qu)卵(luan)(luan)三次(ci)。
七星(xing)瓢(piao)蟲的(de)(de)卵(luan)是一(yi)粒粒豎立成(cheng)排(pai)，形成(cheng)整齊的(de)(de)卵(luan)塊，由飼(si)養(yang)盒中取出以后堆(dui)放(fang)在一(yi)起，很容易彼此(ci)摩擦，影響孵(fu)(fu)化(hua)(hua)率(lv)。七星(xing)瓢(piao)蟲的(de)(de)卵(luan)在20℃時，只需5-6天即可孵(fu)(fu)化(hua)(hua)。25℃時只需3天即可孵(fu)(fu)化(hua)(hua)。如果長時間堆(dui)放(fang)在一(yi)起，不僅(jin)降低孵(fu)(fu)化(hua)(hua)率(lv)，而且幼蟲孵(fu)(fu)化(hua)(hua)以后，也不便(bian)于收集飼(si)養(yang)。因此(ci)，每(mei)次取出卵(luan)粒以后，應及時進行處理。可通(tong)過制(zhi)取卵(luan)卡解決以上問題。
七(qi)星瓢(piao)(piao)蟲(chong)的(de)(de)(de)產(chan)卵(luan)期可(ke)(ke)長達20-30天(tian)，產(chan)卵(luan)的(de)(de)(de)高(gao)峰期亦有7-10天(tian)，因(yin)此，收集(ji)的(de)(de)(de)卵(luan)塊必須立(li)即進(jin)行低溫(wen)保(bao)(bao)(bao)(bao)存，以(yi)防止逐(zhu)日孵(fu)化(hua)(hua)(hua)不(bu)(bu)便集(ji)中使用(yong)。加(jia)之自(zi)然氣(qi)候(hou)的(de)(de)(de)變(bian)化(hua)(hua)(hua)或人工飼養瓢(piao)(piao)蟲(chong)的(de)(de)(de)條件(jian)改變(bian)，都會造成(cheng)(cheng)瓢(piao)(piao)蟲(chong)的(de)(de)(de)產(chan)卵(luan)高(gao)峰期、卵(luan)的(de)(de)(de)孵(fu)化(hua)(hua)(hua)期與田(tian)間(jian)蚜蟲(chong)發生的(de)(de)(de)時(shi)(shi)間(jian)不(bu)(bu)相配合，也(ye)常需要對卵(luan)做低溫(wen)保(bao)(bao)(bao)(bao)存。保(bao)(bao)(bao)(bao)存的(de)(de)(de)時(shi)(shi)間(jian)長短，溫(wen)度(du)(du)高(gao)低都有一定(ding)的(de)(de)(de)限度(du)(du)。在0℃時(shi)(shi)保(bao)(bao)(bao)(bao)存3天(tian)，其(qi)孵(fu)化(hua)(hua)(hua)率(lv)仍(reng)能達到70%以(yi)上(shang)。超過3天(tian)，孵(fu)化(hua)(hua)(hua)率(lv)大為(wei)(wei)降低。如在4℃時(shi)(shi)，可(ke)(ke)保(bao)(bao)(bao)(bao)存7天(tian)，孵(fu)化(hua)(hua)(hua)率(lv)在70%以(yi)上(shang)。在11-13℃之間(jian)，卵(luan)可(ke)(ke)保(bao)(bao)(bao)(bao)存20天(tian)，其(qi)孵(fu)化(hua)(hua)(hua)率(lv)仍(reng)然達到80%左(zuo)右。實驗表明，七(qi)星瓢(piao)(piao)蟲(chong)發育起點溫(wen)度(du)(du)為(wei)(wei)10℃左(zuo)右，低于這個溫(wen)度(du)(du)，瓢(piao)(piao)蟲(chong)卵(luan)雖可(ke)(ke)短時(shi)(shi)間(jian)保(bao)(bao)(bao)(bao)存，但其(qi)成(cheng)(cheng)活率(lv)不(bu)(bu)高(gao)。如保(bao)(bao)(bao)(bao)存在發育起點溫(wen)度(du)(du)之上(shang)，保(bao)(bao)(bao)(bao)存天(tian)數較長，孵(fu)化(hua)(hua)(hua)率(lv)亦高(gao)。因(yin)此，卵(luan)的(de)(de)(de)保(bao)(bao)(bao)(bao)存溫(wen)度(du)(du)以(yi)10-12℃為(wei)(wei)宜。
卵(luan)的(de)(de)孵(fu)(fu)(fu)(fu)化(hua)(hua)要(yao)(yao)求有一定(ding)的(de)(de)溫濕度(du)(du)(du)條件(jian)。在(zai)發(fa)育起點溫度(du)(du)(du)以(yi)上，卵(luan)雖(sui)然可以(yi)孵(fu)(fu)(fu)(fu)化(hua)(hua)，但其最適(shi)宜(yi)的(de)(de)溫度(du)(du)(du)是20-25℃，相對濕度(du)(du)(du)70-80%。因此在(zai)卵(luan)需要(yao)(yao)孵(fu)(fu)(fu)(fu)化(hua)(hua)時(shi)，應由(you)貯存處取回(hui)，放于(yu)(yu)室(shi)(shi)溫中進(jin)行(xing)。一般在(zai)棉(mian)蚜(ya)開始遷飛(fei)棉(mian)田時(shi)，日平均溫度(du)(du)(du)皆在(zai)15℃左右(you)，均能滿(man)足卵(luan)的(de)(de)孵(fu)(fu)(fu)(fu)化(hua)(hua)溫度(du)(du)(du)條件(jian)，孵(fu)(fu)(fu)(fu)化(hua)(hua)的(de)(de)關鍵條件(jian)就在(zai)于(yu)(yu)濕度(du)(du)(du)。如(ru)濕度(du)(du)(du)在(zai)80%以(yi)上，小(xiao)幼(you)蟲很(hen)容易由(you)卵(luan)殼內孵(fu)(fu)(fu)(fu)出(chu)，但在(zai)干燥低濕的(de)(de)條件(jian)下，小(xiao)幼(you)蟲常在(zai)卵(luan)口處掙(zheng)扎，不易脫出(chu)。嚴重時(shi)，甚至不孵(fu)(fu)(fu)(fu)化(hua)(hua)。因此大量的(de)(de)卵(luan)需要(yao)(yao)孵(fu)(fu)(fu)(fu)化(hua)(hua)時(shi)，應創造高濕條件(jian)。孵(fu)(fu)(fu)(fu)化(hua)(hua)時(shi)可在(zai)孵(fu)(fu)(fu)(fu)化(hua)(hua)室(shi)(shi)內地面(mian)潑水，掛濕布等，增(zeng)加室(shi)(shi)內濕度(du)(du)(du)；亦可同時(shi)在(zai)盛放卵(luan)卡的(de)(de)容器內放濕棉(mian)球(qiu)，容器頂部再蓋以(yi)濕布，增(zeng)加卵(luan)卡周(zhou)圍水分的(de)(de)蒸發(fa)條件(jian)，經過這樣處理(li)以(yi)后(hou)，卵(luan)的(de)(de)孵(fu)(fu)(fu)(fu)化(hua)(hua)時(shi)間(jian)較快，孵(fu)(fu)(fu)(fu)出(chu)后(hou)小(xiao)幼(you)蟲生命(ming)力較強。
卵孵化時，應加強檢(jian)查(cha)(cha)與管(guan)理(li)，每日(ri)至少檢(jian)查(cha)(cha)4次，發(fa)現幼蟲(chong)孵出后，應及時取出。在卵的孵化高峰(feng)時，應3-4小時檢(jian)查(cha)(cha)一次，并(bing)且要(yao)求日(ri)夜(ye)有人看管(guan)。
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