Studies on epidemiology and management of pink canker (Corticium salmonicolor Berk. & Br.) in apple
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Date
2013
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Publisher
DYSPU
Abstract
Pink canker (Corticium salmonicolor Berk. and Br.) in apple is one of the major limiting
factor in its cultivation affecting both yield and fruit quality in Himachal Pradesh. Present
investigations were undertaken with an objective to study the prevalence of the disease, role of abiotic
environmental factors in disease development and to devise suitable disease management strategies.
Pink canker was found to occur in moderate to severe form in different apple growing areas of Mandi,
Shimla, Kullu and Sirmour districts of Himachal Pradesh. Based on morphological, cultural and
molecular characters, the pathogen was identified as Corticium salmonicolor Berk. and Br. Moderate
temperatures (19 + 2o C) coupled with high RH (80%) favoured disease development. Conidial
germination and germ tube length was high in Mandi isolate. Out of nine cultivars only, Tydeman
Early Worcester was found moderately susceptible under field conditions. Ace Spur, Spur Winter
Banana and Granny Smith exhibited moderately resistant reaction under flask condition. Under
congenial condition, the pathogen infected leaves and fruits of Royal Delicious. Among integration of
fungicide and plant oils, integration of Contaf + Brassica juncea var. cunefolia and combinaion of
Score + Brassica juncea var. cunefolia provided maximum wound recovery (92.94% and 91.86%
respectively) and callus formation (>10 mm). The combination of Contaf + Cow urine + Melia
azedarach + Vitex negundo + Artimisia roxburghiana + Juglans regia + Roylea elegans and Score +
Cow urine + Melia azedarach + Vitex negundo + Artimisia roxburghiana + Juglans regia + Roylea
elegans in white paint exhibited maximum wound recovery (87.17% and 85.81% respectively) and
callus formation (>10 mm) during 2011-12. Among combination of fungicides + antagonists,
significantly maximum wound recovery (80.47%) was recorded in Contaf + Pseudomonas sp.
followed by a combination of Contaf + Trichoderma hamatum (79.95%).
Description
Keywords
Management, Pink kanker, Corticium salmonicolor, Apples