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田间对比试验表明,作为一项应急补救措施,在病田进行水稻掰蘖补栽(丛),是当前黑条矮缩病发生流行以后最有价值的农业防治技术。掰蘖补栽处理所挽回的稻谷损失随病田发病率的上升而增加。丛病率为10%的杂交晚稻本田经掰蘖补栽后,可增产稻谷25.26kg/亩(约30元),而掰蘖补栽的工时费不足10元。因此,在病害流行年份,本田初期丛病率10%以上的杂交晚稻病田,均值得进行掰蘖补栽的防治工作。
Field trials show that, as an emergency remedial measure, paddy tillers replanting (plexus) in the field is the most valuable agricultural control technology after the prevalence of black-streaked dwarf diseases. The loss of paddy recovered by the tillering replanting increased with the increase of the incidence of the disease. The hybrid late rice Honda, whose cluster rate is 10%, can increase 25.26kg / mu of rice (about 30yuan) after the tillering replanting, while the working hour fee of the tiller replanting is less than 10yuan. Therefore, in the epidemic years of disease, Honda initial rate of more than 10% hybrid late rice disease field, are worth the prevention and control of the tillering replanting.