Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 2
Written by Yonko YONCHEV, Neli KERANOVA, Marina DRUMEVA-YONCHEVA
The present work studies the influence of the vegetation period in Virginia tobacco on the spread of the viruses PVY- Complex (%), TMV (%), TSWV (%), CMV (%). To establish this relation, a correlation analysis was applied and the proven effects were represented by linear regression models. In 2014, with an increase of the period from replanting, the incidence of PVY-Complex (0.997**), TMV (0.860*) and TSWV (0.830*) increased significantly. The effect of the replanting on plant morbidity rate is similar (0.808**) also in 2015. In 2016, the very strong impact of the days from replanting on CMV (0.962**) and TSWV (0.907 **) viruses was proven. In 2017 the increase in the period from replanting leads to an increase in the percentage of diseased plants from PVY-Complex (0.946**), CMV (0.940**) and TSWV (0.976**).
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{simplepopup popup="false" name="Citation41"}YONCHEV Y., KERANOVA N., DRUMEVA-YONCHEVA M. 2020, STUDY OF THE EFFECT OF THE PERIOD OF REPLAINING ON THE MORBIDITY RATE IN VIRGINIA TOBACCO. Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 2, ISSN 2285-5785, 249-252. {/simplepopup}