Management of Phytophthora Induced foot rot and gummosis of kinnow mandarin in low hills of Himachal Pradesh

All the fungicides have healing effect on lesions of foot rot when applied as drenching and pasting. Aliette (0.25%) has resulted 71.6% lesion healing followed by Ridomil MZ (63.7%) at the same concentration. However, Blitox (0.3%) controlled 42.0% of lesion showing constant effect in every year. In case of Aliette the healing effect was fou'nd increased in every year. Gum exudation was totally absent in Ridomil MZ, whereas. maximum in the trees treated with Indofil M-45. More number of new shoots has been recorded in Aliette and Ridomil MZ i.e. 32.8 and 32.0 percent, respectively along with dark green leaf colour. Foliar spray of Aliette has remarkable effect on the healing of lesions and gum exudation caused by Phytophthora species in kinnow mandarin. Maximum control (85.0%) was obtained with 0.25% concentration. As the concentration was raised from 0.1 to 0.3% the lesion healing also increased from 23.57 to 88.1%. Numbers of new shoots were more at 0.2, 0.25 and 0.3 persent concentrations of Aliette. The effect on leaf colour was noticed at 0.15% concentration which increased with the increase in concentration.