论文部分内容阅读
通过近三年(1984—1987年),在保护区果园(即不用药区),每隔5天便开展一次柑桔红蜘蛛及其重要天敌捕食螨的消长规律调查已基本掌握了益害在田间的消长规律。应用此发生消长规律和气象资绿,找出了红蜘蛛第一次发生高峰期与1—2月份平均温度和相关关系,发生量与1—2月份平均每叶螨头数的关系,并找出了一种数学模式的回归方程: Y=154.9621-6.7152x(发生期)和 Y=2.3150+0.6752x(发生量),其相关系数分别为-0.9752和0.9907(详见表一、二)。应用这两个回归方程可作第一次发生高峰期及发生量的预测。并绘制了红蜘蛛的消长曲线图(见图一)。
Through the past three years (1984-1987), the investigation on the growth and decline of predatory mites in citrus red spider mites and their important natural enemies has been carried out every five days in orchards of protected areas (ie no drug use areas) The law of growth and decline in the field. Using this pattern of growth and decline and meteorological greening, the relationship between the average temperature and the average temperature in January-February of the first spider mite occurrence and the average number of spider mites per spider in January-February was found The regression equation for a mathematical model is Y = 154.9621-6.7152x (occurrence) and Y = 2.3150 + 0.6752x (occurrence) with correlation coefficients of -0.9752 and 0.9907, respectively (see Tables 1 and 2 for details). Applying these two regression equations can be used to predict the first occurrence of a peak and its occurrence. And draw the red spider’s growth and decline curve (see Figure 1).