針對(duì)煙草蚜傳病毒病的避蚜與防病關(guān)系研究再報(bào)
Further Researches on the Relationship between Aphid- avoiding and Tobacco Virus Disease Occurring
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摘要: 通過(guò)對(duì)苗床不同避蚜措施在移栽后病毒病發(fā)生情況的對(duì)比, 研究避蚜?xí)r期及設(shè)施與病毒病發(fā)生的關(guān)系, 結(jié)果表明, 40 目防蟲(chóng)網(wǎng)避蚜防病效果最佳, 懸掛塑料條帶和苗床四周平鋪薄膜也有較好的避蚜防病效果。網(wǎng)室栽培條件下, 對(duì)照的煙苗帶毒率都在30%以上, 防蟲(chóng)網(wǎng)等避蚜防病效果顯著,。大田地膜栽培條件下, 移栽后25 d, 防蟲(chóng)網(wǎng)等處理對(duì)蚜傳病毒病有顯著的預(yù)防效果,。移栽后30 d- 40 d, 所有處理同對(duì)照無(wú)顯著差異。移栽后45 d- 60 d, 防蟲(chóng)網(wǎng)處理的發(fā)病情況顯著輕于對(duì)照,。因此, 苗期避蚜結(jié)合大田地膜覆蓋對(duì)預(yù)防病毒病有重要意義,。Abstract: According to the anti- disease effects of manifold measures in tobacco seedbeds, the comparatively proper period and measures of aphid- avoiding to reduce tobacco leaf losing in term of virus are picked out. The result showed that the anti - disease effect of prevent worm netting with aperture 1/40 mm was the best, the effects of hanging plastic strips and tiling plastic membrane around seedbed were relatively good. When cultivated in netting, the ratio of virus- carrier tobacco seedling of comparison treatment was over 30%, but the ratio of above three measures was very low. When cultivated in fields, the anti- virus- disease effects of above three measures was prominent in course of 25 days after transplanting, but the effect of each treatment had no evident difference compared with comparison treatment 30 days or 40 days after transplanting. The anti- virus- disease effect of the treatment covered with netting was distinctly better than comparison treatment 45 days or 60 days after transplanting, so aphid - avoiding measures before tobacco seedling transplanting associate with plastic membrane covering after transplanting were essential for preventing and control of virus diseases.
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