摘要
本文研究明确在适宜条件下茶橙瘿螨种群的增长规律,每头螨的发生量(Y,头/头)与有效积温(X,日度)的关系式为:Y=3×10^(-7)X^3+0.0006X^2+0.0164X+0.969。同时研究了7个生态因子与螨口消长的关系。结果表明,温度小于18℃或超过27℃时,螨口发展减慢。相对湿度(RH)在75％～90％时,对螨口发展最有利;RH达95％时,螨口发展显著减慢;RH≤50％时,螨口停止发展甚至下降。螨口增长与降雨量和降雨强度呈负相关。茶梢的嫩度对螨口增长影响较大,一芽三叶、一芽四叶、成老叶的螨口平均发生量分别是一芽二叶的70％、55％、27％。螨口基数≤56.4头/叶时,对螨口正常发展无影响;螨口基数>102.2头/叶时,螨口基数越大,螨口发展速度显著减慢。天敌对螨口增长影响很小。日照对螨口增长无影响。
The relationship between the population dynamics of the tea pink mite, Acaphylla theae, and various ecological factors were studied. Under favorable condition, the relationship of the fecundity of the mite (Y, head per head) and the cumulation of effective temperature (X, day degree) could be modeled by the equation: 7=3 x 10-7X3+0.0006X2+0.0164X+0.969. The development rate of the mite population was decreased when the temperature went below 18T! or above 21C. The most favorable relative humidity (RH) for the mite was between 75% and 90%. If RH went below 50% or above 95%, the development rate of population would be significantly decreased even stopped. There was a negative relationship between the development rate of population and precipitation or rainfall intensity. The amounts of mite on one bud 3 leaves shoot, one bud 4 leaves shoot and mature leaf were 70%, 55%, 27% of those on one bud 2 leaves shoot respectively, so the development rate of population became slower as the tea plant shoot became older. The mite development rate of population would not be affected when the initial density of mite was lower than 56.4 head per leaf, whereas it would be decreased as the density increased when the initial density was higher than 102.2 head per leaf. The natural enemies of the mite were seldom found in the field, so the effect of the natural enemies on the mite development of population was insignificant. The effect of sunshine on the population development of mite was not significant.
出处
《茶叶科学》
CAS
CSCD
北大核心
2003年第B06期53-57,共5页
Journal of Tea Science
基金
浙江省自然科学基金(395107)
