Zheng Mei-rong

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Wen Lin-hong

Guizhou Academy of Agricultural Sciences

Li DeYou

Harbin Institute of Technology

Tianwen Wang

Jiangsu Maritime Institute

Chen GuoTao

LI Chong-xin

Guilian Li

National Institute for Communicable Disease Control and Prevention

Yi Jin

Beijing Forestry University

LI Cong-xin

Institute of Technology of Cambodia

Gan Shun

Xie Wenxiu

Cooperative Institutions

Harbin Institute of Technology

Thermo Fisher Scientific (Japan)

Guizhou Academy of Agricultural Sciences

Beijing Advanced Sciences and Innovation Center

Harbin University

Harbin Finance University

Guizhou Institute of Plant Protection

Zhejiang Financial College

Guizhou University

Guizhou Electric Power Design and Research Institute

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Cultivation Techniques with Pollution-free for Lettuce Leaf in Summer and Autumn of Guizhou

Guizhou nongye kexue (2006)

Ning Xuan-gen Gan Shun Wen Lin-hong Zheng Mei-rong Xie Wenxiu

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Damaging Investigation and Pollution-free Control of Helicoverpa armigera in Tomato

Guizhou nongye kexue (2006)

Li DeYou LI Chong-xin Zheng Mei-rong Tianwen Wang Wen Lin-hong

The occurrence and damage situation of tomato Helicoverpa armigera and control effects of the pesticide with pollution-free were conducted in Daxi township,Dafang county during 2004～2005.The results show that the flowers and fruits of tomato are damaged by the larvae of Helicoverpa armigera on middle and last ten-day period of August,last ten-day period of September,first and middle ten-day period of October,the full period of insect hole on fruits is from middle ten-day period of August to last ten-day period of September and the peak period of insect hole on fruits is on middle ten-day period of September.Three pesticides with pollution-free and higher control efficiency were selected by the field experiment and their control efficiency were 93.84%～92.35%,90.86%～84.95% and 89.40%～85.20% respectively,which can be used in tomato production.

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Investigation of downy mildew of off-season cabbage planted in areas with a high elevation and its pollution-free control in Guizhou.

Xi'nan nongye xuebao (2007)

Li DeYou Guilian Li Tianwen Wang LI Cong-xin Chen GuoTao

The investigation of downy mildew of off-season cabbage and its pollution-free control experiment were carried out in Daxi town with a high elevation,Dafang county,Guizhou.The results showed that the downy mildew occurred on the first ten-day of August and the disease index raised with increasement of the cabbage plant age,and the disease index was from 1.23(the first ten-day of August) to 35.31(the last ten-day of September).Two pestcides with the efficiency control effect were selected from five pesticides in the experiment of controlling downy mildew,and their control effect were 87.44 %-85.77 % and 86.01 %-83.37 % respectively,which can be used in cabbage production.

Growing season

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Investigation of Cabbage Worm's Growth and Declination in Northwest of Guizhou in Summer-autumn,Off-season and Its Control

Journal of Changjiang Vegetables (2008)

Zheng Mei-rong

In 2006,an investigation and insecticides control experiment about the harmless of summer and autumn off-season cabbage worm’s growth was made in Dafang County,Guizhou Province,which showed that: there was an obvious two-peaks type appeared on cabbage worm's growth and decedent and the happening major onset of it appeared form August 10th to September 14th,the hatching time were August 20th and September 9th. Five insecticides were selected to make the field defending test and from which we've screened out three types of high effective insecticides,they were: 1.8% abamectin cream,40% phoxim cream and 25% phoxim fenvalerate. Their efficiencies were: 89.19%-97.27%,89.26%-94.33% and 87.55%-90.26% respectively.

Phoxim

Abamectin

Fenvalerate

Summer season

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Growth and decline of off-season cabbage worm in fields and its control with free-pollution in Dafang county,Guizhou

Xi'nan nongye xuebao (2008)

Tianwen Wang Wen Lin-hong Guilian Li Li DeYou LI Chong-xin

The occurrence status of off-season cabbage worm was investigated and its pesticide control experiment was carried out in Dafang county,Guizhou in 2006.The results showed that there was an obvious bimodal distribution in growth and decline of cabbage worm.The peak occurrence period appearred from 10,August to 24,September and the peak hatching time was 25,August and 14,September,respectively.3 kinds of pesticides with efficiency and free-pollution were selected from 5 tested pesticides and the control effect of 1.8 % abamectin emulsion,40 % phoxim emulsion and 25 % phoxim fenvalerate was 89.19 %-97.27 %、89.26 %-94.33 % and 87.55 %-90.26 %,separately.

Phoxim

Abamectin

Fenvalerate

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