论文部分内容阅读
在19、22、25、28、31℃恒温条件下,对双七瓢虫[Coccinula quatuordecimpustulata(Linnaeus)]各虫态的发育历期、发育速率、发育起点温度和有效积温进行了研究。结果表明,在19～31℃温度范围内,双七瓢虫各虫态发育速率加快、发育历期随着温度的升高逐渐缩短,在19、22、25、28、31℃温度条件下,卵—蛹期的发育历期分别为32.13、21.59、17.81、13.16 d和11.18 d。试验测得其卵、1～4龄幼虫和蛹的发育起点温度分别为11.47、12.15、12.74、15.02、12.96℃和13.09℃,相应的有效积温分别为39.16、34.06、22.89、21.36、39.93℃和42.41℃。根据有效积温和发育起点温度建立了回归方程和历期预测式。
The developmental stages, developmental rates, developmental start temperature and effective accumulated temperature of each strain of Coccinula quatuordecimpustulata (Linnaeus) were studied under the conditions of 19, 22, 25, 28 and 31 ℃. The results showed that in the temperature range of 19 ~ 31 ℃, the developmental rate of each insect was accelerated and the developmental period was gradually shortened with the increase of temperature. Under the conditions of 19,22,25,28 and 31 ℃, The developmental stages of egg-pupal stage were 32.13, 21.59, 17.81, 13.16 d and 11.18 d, respectively. The developmental starting temperature of the eggs, 1st to 4th instar larvae and pupae was 11.47, 12.15, 12.74, 15.02, 12.96 ℃ and 13.09 ℃, respectively. The corresponding effective accumulated temperatures were 39.16, 34.06, 22.89, 21.36, 39.93 ℃ and 42.41 ° C. Based on effective accumulated temperature and developmental starting temperature, regression equation and predictive equation are established.