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Effective Duration and Influencing Factors of Six Cupric Pesticides Against Valsa mali(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年16
Page:
61-67
Research Field:
Publishing date:

Info

Title:
Effective Duration and Influencing Factors of Six Cupric Pesticides Against Valsa mali
Author(s):
GUO YongbinTIAN MiaoWANG YananHU TongleWANG ShutongCAO Keqiang
College of Plant Protection,Agricultural University of Hebei,Baoding,Hebei 071000
Keywords:
apple tree Valsa cankercupric pesticidesinhibiting effecteffective durationinfluence factor
PACS:
-
DOI:
10.11937/bfyy.20170276
Abstract:
Six cupric pesticides were used as tested agents,80% lime sulphur WP and 29% mancozeb SL were used as chemical control,their lasting time,influence factors and spreading behavior were studied by spore germination method in order to supply reference for cupric pesticides use and preventing apple tree Valsa canker.The results showed that lime times bordeaux mixture(Cu∶CaO∶H2O=1∶2∶200)had the highest inhibition effect and longest lasting period (more than 20 days) among the tested fungicides,and the inhibition ratio was 87.97% 20 days after spraying.Light and rainfall had no significant effect on its inhibition activity,77% copper calcium sulphate WP and 12% resin acid copper salt EC,which had medium ability on spreading,suffered different influences from light and rainfall.29% lime sulphur had worse effect than lime times bordeaux mixture.While,light and rainfall had significant effect on 80% lime sulphur WP,which lasting only 7 days.It was recommended to use lime times bordeaux mixture to control apple Valsa canker.

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Last Update: 2017-08-29