PHYSICAL AND CHEMICAL CONTROL OF GRAPEVINE CUTTING BLACK FOOT DISEASE IN NURSARY

The study aimed to control the black foot disease of grapes using Physical control by immersing the cuttings in hot water (50o c for 30 minute) which reduced the severity of infected roots to 0.203 and in the Foliage decline from 0.560 (control) to 0.230. and hot water was also enhanced some characters of young plants throughout increasing of number of internode , plant height , number of Roots , dry weight for each of the roots and foliage.In vitro the hot water inhibited the ratio of the colony forming units of pathogens on PDA to 18.62 - 59.09 %, compared to the liquid Parafine which was not effective in reducing the severity of black foot. Fungicides of kareptanol SL , Topsin M and Tachigaren L in proved to be highly efficient in inhibiting fungal growth and their sporulation. Topsin M and kareptanol SL, were the best fungicides since reducing the infection of black foot from 0.553 to 0.210. affectivity of Topsin M and Tachigaren L were not varying significantly. Application of kareptanol SL produced highest number of internodes (8.95/young plant), with 20.50 cm in plant height largest number of roots and dry weight for each of the foliage and root growth (8.57 and 10.05 gm /plant respectively).