| 杂交水稻黑条矮缩病发生为害损失与防治指标研究 |
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| 作者姓名： | 汪恩国 王华弟 关梅萍 陈克松 |
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| 作者单位： | 浙江省临海市植物保护站，浙江省植物保护总站，临海市农科所，浙江省临海市植物保护站 临海 317000，杭州 310021，临海 317000，临海 317000 |
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| 基金项目： | 浙江省重点科技项目(971102014). |
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| 摘 要： | 根据1998-2003年杂交水稻黑条矮缩病发生为害损失与防治指标研究,测定了杂交水稻不同组合、不同生育期的发病率,以及秧苗期与大田期的侵染机率,分析了杂交水稻黑条矮缩病前后作发病率关系:M=1.6822m 0.1049,以及株发病率(M％)与产量损失率(Y％)的关系:Y=0.9776M-0.1935;阐述了灰飞虱不同虫量(X)与发病率和产量损失率(Y％)的关系:秧苗期为Y1=12.1841X1-1.0784,大田前期为Y2=4.5159X2-0.4620。在拟定经济允许损失水平的基础上,提出杂交水稻秧苗2-5叶期和大田初期为防治适期,并制定杂交水稻黑条矮缩病的策略性防治指标为前作穗期防治的黑条矮缩痛株发病率1.0％,制定秧苗期防治指标为带毒灰飞虱0.15只／0.11m2、大田初期防治指标为带毒灰飞虱4000只／667m2(百丛带毒灰飞虱20只)。经应用验证,与实际基本吻合。
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| 关 键 词： | 杂交水稻 黑条矮缩病 灰飞虱 发生动态 为害损失 防治指标 |
Occurrence of Black-streaked Dwarf Viral Disease of Hybrid Tice and Its Economic Threshold |
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| Authors: | Wang Enguo Wang Huadi Guan Meiping Chen Kesong |
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| Institution: | (1Plant Protection Station of Linhai City in Zhejiang Province, Zhejiang Linhai 317000; 2Plant Protection General Station of Zhejiang Province, Zhejiang Hangzhow 310020, China; 3Institute of Agricultural Sciences of Linhai City in Zhejiang Province, Linha |
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| Abstract: | Based on experiment between occurrence of black-streaked dwarf viral disedse of hybrid rice (RBSDV) and its economie threshold in 1998-2003. The results showed that incidence of RBSDV was tested during different hybridized combination and growth stage of hybrid rice, and infection probability in seeding stage and vegetative stage on hybrid rice ,and relationship of incidence of last stubble (m%) and next stubble(M%) and yiled loss rate(Y%) were analysed, the model are as follows M=1.6822m 0.1049 and Y=0.9776M-0.1935 .Relationship of various small brown planthopper(SBPH) (Laodelphax striatellus) population density (X) and infection rate and yiled loss rate (Y%) was invesligated , the model are as follows Y1=12.1841X1-1.0784 in seeding stage and Y2=4.5159X2-0.4620 in the early days of field stage . It was provided that control optimal time were 2 nd-5th leave age in seeding stage and early tillering stage in the field stage. On economical injuring level the economic threshold was determined as the diseased rate reaching 1.0% last stubble and 0.15 viruliferous SBPH vector /0.11m2 in seeding stage and 4000viruliferous SBPH vector /667m2 (20 viruliferous SBPH vector/100 clusters) in early tillering stage on hybrid rice. |
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| Keywords: | Hybrid Rice RBSDV Laodelphax Striatellus occurrence Damage Economic Threshold |
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