信息段法估测油松整株雌花数和球果数

用信息段法估测油松较密林分整株的雌花数和球果数 ,结果得出 :1 / 3CH可做为整株雌花数和春季当年球果数估测的最佳信息段 ;1 / 3～ 2 / 3CH可做为整株春季隔年球果数和秋季成熟球果数估测的最佳信息段 ;在人力充足的情况下 ,可考虑用 1 / 2 CH估测整株雌花数、当年球果数。

油松前期球果数(以及雌花数)和后期球果数关系的分析

本文对当年雌花数与当年球果数 ;当年雌花数、当年球果数与第二年春季隔年球果数 ;春季隔年球果数与秋季成熟球果数 ;春季当年球果数与第二年秋季成熟球果数这四种情况的前、后期落花率、落果率以及相关性进行了研究 ,为油松种子提前半年和一年半进行预测提供了依据和数学模型。

Effect of the Variety of Fig Tree on Some Biological Parameters of Ceratitis capitata Wied, 1824 （Diptera： Trypetidae） in Some Orchards in the Kabylie

The Mediterranean fruit fly, Ceratitis capitata Wied. （1824） is one of the most important pest that can infest orchards if its spread is not controlled. Among the preventive measures recommended in the fight against this pest, we are interested in looking for varieties that are less favorable to the development of this pest among different varieties of fig trees in our region. The biological parameters of the fruit fly which were followed in this study are duration of pupation, rate of emergence, sex ratio and longevity of males and females. The results show that these parameters vary depending on the variety of fruit.