A Preliminary Study on the Relationship between the Content of Azadirachtin and the Modality and the Autumn of Seed

WU Jiang-chong; PENG Xing-min; ZHENG Yi-xing; ZHANG Yan-ping

The relationship befween the content of azadirachtin,the modality and the autumn of seeds was studied.The length/width ratio of seed is the morphological characteristic which related to the content of azadirachtin among the kernel yield,the kilo-grain weight,and the length/width ratio of seed.The correlation between the length/width ratio of seed(X) and the content of azadirachtin(Y) was concluded as the model: Y=0.295+0.134X-0.028X2.The content of azadirachtin of kernel reach the peak when its length/width ratio around 2.39.It can be used as an indicating index to estimate the content of azadirachtin of kernel for the selectionof superior mother trees.But there is no relation between the autumn of seed and the content of azadirachtin.A tree with high yield of seeds which was full and its length/width ratio around 2.39 is the most promisingly to be a superior mother tree of neem plantation on pesticide purpose.

1. Research Institute of Resource Insects,CAF,Kunming 650224,Yunnan,China

Received Date: 2005-10-14

Abstract: The relationship befween the content of azadirachtin,the modality and the autumn of seeds was studied.The length/width ratio of seed is the morphological characteristic which related to the content of azadirachtin among the kernel yield,the kilo-grain weight,and the length/width ratio of seed.The correlation between the length/width ratio of seed(X) and the content of azadirachtin(Y) was concluded as the model: Y=0.295+0.134X-0.028X2.The content of azadirachtin of kernel reach the peak when its length/width ratio around 2.39.It can be used as an indicating index to estimate the content of azadirachtin of kernel for the selectionof superior mother trees.But there is no relation between the autumn of seed and the content of azadirachtin.A tree with high yield of seeds which was full and its length/width ratio around 2.39 is the most promisingly to be a superior mother tree of neem plantation on pesticide purpose.

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Reference (16)

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A Preliminary Study on the Relationship between the Content of Azadirachtin and the Modality and the Autumn of Seed

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