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Influence of rootstocks on white root rot (Dematophora necatrix) resistance in apple (Malus baccata)

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Title Influence of rootstocks on white root rot (Dematophora necatrix) resistance in apple (Malus baccata)
Not Available
 
Creator A Kumar
B L Attri
A Kishore
S Debnath
M S Mer
R Narayan
 
Subject Apple
Dematophora necatrix
Malus baccata
var. Himalaica,
Resistance
 
Description Not Available
An experiment was conducted under polyhouse and field conditions during 2013, 2014 and 2015 to evaluate the level
of resistance of less known apple rootstock, i.e. Paron (Malus baccata var. himalaica) and some popular rootstocks
of the region (MM 106, MM 111, M 9 and Srinagar crab) against white root rot disease. All the test rootstocks were
grafted with CITH Lodh Apple-1 before their use in field conditions. Paron showed high resistance against D. necatrix
by exhibiting least mortality (15.33%) at highest test dose (10 g/kg soil) of inoculum in pot culture under polyhouse,
whereas other test rootstocks showed 100 percent mortality at this dose of inoculum. In the field, Paron showed no
wilting symptoms on scion cultivar even after 60 days of inoculation, it showed least bronzing and inward cupping
of leaves (3.25%), defoliation (3.50%), necrosis on bark (21 mm), wood (17 mm) and vascular tissues (23 mm). It
was rated as resistant against D. necatrix as compared to other test rootstocks on the basis of significantly lowest
disease severity (4.35%) and least effect of test pathogen inoculation on its above and below ground parts. Srinagar
crab was rated as highly susceptible in comparison as, it exhibited significantly highest disease severity (69.80%).
From this study, it can be inferred that the rootstock of Paron should be used for shaping production of apple in
Kumaon region of Uttarakhand.
Not Available
 
Date 2020-08-19T10:28:01Z
2020-08-19T10:28:01Z
2020-01-01
 
Type Research Paper
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/39819
 
Language English
 
Relation Not Available;
 
Publisher Not Available