白星花金龟主要习性及其群集为害玉米行为机制的初步研究

Preliminary Study on Propensity of Potosia brevitaris Lewis and Its Behaviour Law in Endangering Maize by Formicating

采用风洞试验法研究了白星花金龟群集为害玉米的行为机制。结果表明:鲜食甜玉米的穗在各器官中对白星花金龟成虫的诱集力最高,达85%;白星花金龟成虫或玉米螟幼虫为害玉米穗时对白星花金龟成虫有诱集作用,其选择系数分别为0.33和0.03,且白星花金龟成虫和玉米螟幼虫共同为害玉米穗时对白星花金龟成虫的诱集作用最强。通过室内饲养及野外观察初步明确了白星花金龟成虫昼夜取食、多次交尾、多次产卵及幼虫腐生、腹面朝上倒行等主要习性。

Through wind tunnel simulation experiment, we know that among all parts of green sweet maize, ear has the biggest attraction to Potosia brevitaris, the rate of which reaches 85 %. Ostrinia furnacalis＇ larva and Potosia brevitaris that are endangering maize can attract the adult of Potosia brevitaris, and the selection coefficients are respectively 0.33 and 0.03. Ostriniafurnacalis＇ and Potosia brevitaris that are endangering maize at the same time have the biggest attraction to other adults ofPotosia brevitaris. Through indoor raising and outdoor observation, we know that adult of Potosia brevitaris eats all day and all night, mates several times, lays eggs several times in its life. Its larva likes to eat rot matter and crawl rearward with its abdomen upturned.