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Relevance of Mills infection periods to apple scab (Venturia inaequalis) prediction and rescheduling fungicide' applications in Himachal Pradesh

Indian Agricultural Research Journals

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Title Relevance of Mills infection periods to apple scab (Venturia inaequalis) prediction and rescheduling fungicide' applications in Himachal Pradesh
 
Creator THAKUR, V S
KHOSLA, K
 
Subject V. inaequalis, Mills infection period, prediction
 
Description A study was conducted during 1990-96 on the relevance of Mills scab infection criteria for improving efficiencyin the monitored apple scab control programme. The investigations on the length of leaf wetness for the majority ofinfection periods (light, moderate and severe) occulted, indicated 1-3 days delay for symptoms development underHimachal Pradesh conditions. The observations recorded on potted and orchard plants showed that the light infectionperiod required at least 3 days more for the development of scab symptoms at leaf wetness between 9.0-13.4 hr and ataverage temperature range between 8.S-21AoC, whereas moderate and severe infection periods (>15.0 hr leaf wetness)required 1 more day to exhibit the symptoms. The rescheduling of fungicide applications on the occurrence of infectionperiods, however, saved aileast 3 sprays in comparison to 8 protective sprays in the growing season. Prediction andmonitored spray programme may be devised in accordance to the prevailing weather conditions of the region.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2013-01-15
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/26355
 
Source The Indian Journal of Agricultural Sciences; Vol 69, No 2 (1999)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/26355/12074
 
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