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Suppressive effects of composts on soil-borne and foliar diseases of French bean in the field in the western Indian Himalayas

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Title Suppressive effects of composts on soil-borne and foliar diseases of French bean in the field in the western Indian Himalayas
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Creator Deeksha Joshi, K.S. Hooda, J.C. Bhatt, B.L. Mina, H.S. Gupta
 
Subject Compost teas Field suppression Phaseolus vulgaris Angular leaf spot Phaeoisariopsis griseola Rhizoctonia root rot
 
Description Not Available
The high incidence of various soil-borne and foliar diseases is a major production constraint in the
profitable cultivation of French bean. Compost and compost teas have been widely explored as an ecofriendly
option for controlling plant diseases in container mixes. However, there is limited information
regarding their disease suppressive potential under field conditions especially against diseases of French
bean. The aim of this study was to investigate the suppressive potential of six composted substrates
(farmyard manure, poultry manure, vermicompost, spent mushroom compost, Lantana camara and
Urtica sp.), in comparison to a recommended chemical fungicide (carbendazim), against soil-borne and
foliar diseases of French bean under the conditions of western Indian Himalayas. The field experiment
was conducted over two growing seasons and the composts applied as a soil amendment and later as
foliar sprays of their fermented extracts. There was a high level of root rot suppression (>33%) in the
poultry manure, Lantana and Urtica compost treatments in both experimental years and these treatments
were on par with the chemical seed treatment. All the compost treatments showed a moderate
but significant reduction (>20%) in angular leaf spot severity also but none was comparable to that of
chemical sprays. There was considerable variability in the suppressiveness of different composts. Overall,
poultry manure, composted Urtica sp. and composted Lantana camara treatments were superior to other
composts in suppressing both Rhizoctonia root rot (Rhizoctonia solani Ku¨hn) and angular leaf spot
(Phaeoisariopsis griseola (Sacc.) Ferraris). The different compost treatments exerted a significant effect on
the population of Trichoderma spp. and fluorescent pseudomonads in the plant rhizosphere. The highest
population of these antagonists was recovered from poultry manure and Urtica compost treatments
indicating that it may be a major factor contributing towards the higher disease reduction observed in
these treatments. All composts increased yield over the control with maximum yields recorded in
poultry manure and Urtica treatments. Although Lantana compost suppressed disease, the yield levels
in this treatment were quite low indicating that the compost may be phytotoxic. Our results suggest that
application of composts and compost extracts derived from poultry manure and Urtica sp. has the
potential to provide effective control of diseases and improve yield in bean under field conditions.
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Date 2021-11-17T08:21:26Z
2021-11-17T08:21:26Z
2009-03-16
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/67510
 
Language English
 
Relation Not Available;
 
Publisher International Association for the Plant Protection Sciences