Current status and prospects of mixture planting for control of rice blast in Yunnan.
2001
Zhu Youyoung | Chen Hairu | Fan Junghua | Wang Yunyue | Li Yan | Chen Jianbing | Li Zuoshen | Zhou Jinyu | Fan Jin Xiang | Yang Shisheng | Maguang Liang | Hu Lingping | Mundt, C.C. | Borromeo, E. | Leung, Hei and Mew, T.W.
Under the project funded by the Asian development Bank on "Exploiting Bio-diversity for Sustainable Pest Management", scientists from the Philippines-based International Rice Research Institute (IRRI) and the Yunnan Agricultural University began a farmer participatory project to control blast by diversifying varieties in farmers' fields. Large-scale field tests for two consecutive years showed that the highly susceptible glutinous rice varieties (Huangkenuo and Zinuo) suffered less disease when interplanted with the generally resistant indica hybrid varieties (Xianyou 63 or Xianyou 22). The field design was a repeating pattern of one row of glutinous rice inter-planted with four or six rows of indica rice. Helped by a vigorous extension campaign, farmers in Yunnan rapidly adopted the scheme, with area planted to the mixture now covering 42, 500 hectares. This rapid adoption can be attributed to strong support from technicians and leaders of counties, relevance to the needs (problems) of farmers in the a ea, simplicity and effectiveness of the technology, improvement in the yield and income of farmers. Plans are now in place to implement the technology in other provinces of China, and to widen the options for varieties that can be used for diversification.
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