Posted on January 31, 2010 by moni
by
M. M. Escalada, University Professor, Visayas State University, Leyte, Philippines
Manit Luecha, Director, Chainat Rice Seed Center, Chainat, Thailand
Le Van Thiet, Deputy Director, Southern Regional Plant Protection Center, Long Dinh, Vietnam
Zhu Zeng Rong, Associate Professor, Zhejiang University, Hangzhou, China
In farmer surveys, scales are often used to measure respondent perceptions, beliefs, and attitudes. Results are [...]
Filed under: Communication and policy analyses, Ecological engineering | Tagged: estimating the Cronbach's alpha of an ecological engineering attitude scale for farmers, reliability score of attitude scale on eoclogical engineering for farmers | Leave a Comment »
Posted on January 28, 2010 by moni
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K.L. Heong
Insect Ecologist
International Rice Research Institute
Los Baños, Philippines
The Bangkok Post reported on 26 January 2010 that Thailand has cut the second crop output forecast by nearly 16% from 8.3 million tons to 7 million tons. The main reasons cited by officials were water shortage and heavy infestations by planthoppers in key rice areas. http://www.bangkokpost.com/business/economics/31763/second-crop-output-forecast-cut-by-16. Most [...]
Filed under: Planthoppers | Tagged: Thailand brown planthopper problem, Thailand cuts second crop rice output | Leave a Comment »
Posted on January 26, 2010 by moni
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Orapin Wattanesk, Acting Director, Research Bureau, Rice Department, Thailand
Manit Luecha, Director, Chainat Seed Center, Rice Department, Thailand
The brown planthopper (BPH) has infested several provinces in Central Thailand in the in season of 2009/2010 and Phichit province was badly affected. Agricultural authorities reported that about 490,000 rai (78,400 ha) have been destroyed which is about 30% [...]
Filed under: Planthoppers | Tagged: planthopper outbreak in Phichit province, Planthopper outbreak in Thailand | 1 Comment »
Posted on January 17, 2010 by moni
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Manit Luecha, Director Chainat Seed Center
Rice Department, Thailand
Insecticides are known to cause secondary developments and resurgences in brown planthopper (BPH) populations. They disrupt the food web structures, disorganize predator-prey relationships and favor rapid population developments of invading BPH resulting in hopperburn (Heong and Schoenly, 1998). Broad spectrum insecticides that have strong effects on natural [...]
Filed under: Planthoppers | Tagged: Chainat insecticide use | 2 Comments »
Posted on January 10, 2010 by moni
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Witchuda Rattanakarn and Pamorn Pattawung
Bureau of Rice Research and Development, Rice Department, Bangkhen, Thailand, and
Phitsanulok Rice Research Center, Rice Department
On December 24, 2009, we traveled to 11 sites in three provinces, Khampaengphet, Pichit and Pitsanulok, interviewed farmers and made field assessments of damages caused by brown planthopper (BPH) and the two viruses it transmits, the [...]
Filed under: Planthoppers, Virus disease management | Tagged: grassy stunt virus infection, ragged stunt virus infection | 1 Comment »
Posted on January 8, 2010 by moni
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K.L. Heong and I.R. Choi
International Rice Research Institute
Los Baños, Philippines
The Southern Rice Black Streak Dwarf Virus (SRBSDV) was first discovered in Guangdong province about 9 years ago. Zhou et al (http://ricehopper.files.wordpress.com/2009/01/zhou-et-al-2008-southern-rice-black-streakeddwarf-virus.pdf) and Zhang et al (http://ricehopper.files.wordpress.com/2009/01/zhang-et-al-2008-a-black-streaked-dwarfdisease-on-rice-in-china-is-caused.pdf) published the descriptions of this new virus transmitted by the white back planthopper (WBPH). The virus has also [...]
Filed under: Virus disease management | Tagged: Southern Rice Black Streak Dwarf Virus, virus disease consortium | Leave a Comment »
Posted on January 2, 2010 by moni
by
K.L. Heong
International Rice Research Institute
Los Baños, Laguna, Philippines
In early September 2009, the Ministry of Agriculture launched a campaign in response to heavy planthopper damages in Suphan Buri, Ang Thong and Chainat provinces. (http://www.ricehoppers.net/2009/09/07/campaign-to-manage-planthoppers-launched-in-thailand/Campaign). The planthopper problem since then seems to have intensified. In late December 2009, the Ministry launched another campaign series, much larger [...]
Filed under: Planthoppers | Tagged: Thailand planthopper control campaign | 1 Comment »
