摘要
在15℃、18℃、21℃、24℃、27℃、30℃、33℃和室温下,测定了喜树小绿叶蝉(Emposcasp.)若虫期各虫态的发育历期。结果表明,1龄历期随温度升高呈抛物线变化,30℃时发育历期最短;33℃下初孵若虫2龄以后全部死亡;2龄、4龄随温度升高呈负线性变化;3龄、5龄、若虫期随温度升高呈抛物线变化。采用直线回归法和直接最优法计算发育起点温度和有效积温,并用变异系数进行检验,结果表明,最优化法计算结果优于直线回归法,1、2、3、4、5龄和若虫期发育起点温度分别为:7.78、5.03、6.87、6.08、8.19和6.60℃;有效积温分别为:38.49、42.63、39.29、43.23、66.31和235.61日.度。
The developmental period of nymphs of Ernposca sp. on Camptotheca acuminate Decne was determined under 7 constant temperatures （ 15,18,21,24,27,30, 33℃ ） and room temperature （the average temperature was 26 ℃ ）. The results showed that with the temperature increase the first instar nymph was parabola model and the time of first instar was the shortest under 30℃. The hatching nymphs （under 33℃） could not develop in the third instar, Further more, with temperature increase the second and fourth instar of nymph period was negative liner relation while the third and fifth instar of nymph period and nymph period was the parabola model. The threshold temperature and effective accumulated temperature were calculated by two methods of optimization and linear regression and the results were examined by coefficient of variability. The results showed that the optimum seeking method was better than the linear regression method in the statistics of test data. The threshold temperatures for the first, second, third, fourth, fifth instar and the whole nymph period were 7.78,5.03,6.87,6.08,8. 19 and 6.60℃ and the effective accumulated temperatures for these instars were 38.49,42.63,39.29,43.23,66, 31 and 235.61 ℃ per day respectively.
出处
《贵州农业科学》
CAS
2006年第1期23-25,共3页
Guizhou Agricultural Sciences
基金
贵州省科技项目"贵州主要地产中药材病虫害种类调查及重要病虫害综合防治技术研究"[黔科合中药专字(2003)52号]
