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A study on contact toxicity of extracts from Polygonum orientale against 13 species of agricultural pests
HU Guan-fang, LIU Min-yan, SHEN Hui-min, ZHANG Xin-rui, LI Yu-qi, NIU Shu-jun
Acta Prataculturae Sinica . 2011, (4): 229 -235 . 

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