摘要
调查分析了 1～ 5叶茶梢上假眼小绿叶蝉的种群动态及虫态结构。结果表明 :该虫种群密度低时以指数式增长 ,种群密度高时以逻辑斯谛式增长。在茶梢生长初期 ,以成虫和卵为主。从二、三叶梢开始 ,若虫数量升至第二位 ,成虫降至第三位。种群密度达到饱和点时 ,以卵密度下降为主要标志。根据假眼小绿叶蝉卵和茶梢生长速率的关系 ,建立了采茶控制该虫种群密度的数学式。首次从理论上论述了采茶在防治假眼小绿叶蝉上的作用。在秋茶末期 ,采摘试验显示 ,采摘嫩度越高 ,控害效果越好。
The results from analysing the population trends and morphological structure of E. vitis on the tea shoots show that the insect number increases in index when the population density of E. vitis is low, and the insect number increases in logistic when the population density of E. vitis is high. The adults and eggs exist mainly at the growing primary period of the tea shoot. Beginning from the tea shoots with 2～3 leaves stage, the nymph number raises to second position and the adult number decends to third position as the population density reaching to the saturation point, the main sign of it is the decrease of the egg number density. According to the relationship between the egg number of E. vitis and the growth rate of tea shoot, the mathematical formula of population density controlled by picking leaf is established, which first discusses the effect of controlling E. vitis by means of picking leaf. The higher the young degree of picking leaf is, the better the control efficiency is, during the final phase of Autumn tea.
出处
《贵州农业科学》
CAS
2000年第4期17-20,共4页
Guizhou Agricultural Sciences
基金
贵州省自然科学基金资助项目!(黔基合计字〈1991〉0 0 39号 )
关键词
假眼小绿叶蝉
茶梢
种群结构
采茶防治
茶叶害虫
Empoasca vitis
population density
tea shoot
controlling by picking leaf
