Leaf curl virus disease in cotton in relation to microclimate under two growing environments
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Date
2012
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
CCSHAU
Abstract
The present investigatio n was undertake n for evaluation Leaf cur l virus disease in cotton in
relatio n to mic roclimate unde r two growing e nviro nme nts . The mate r ials for the present investigation
compr ised of 3 cotton cultivars, including two dates of sowing Viz. 30
th
Apr il and 30
th
May . The
exper imental materials was grown at the Research Farm of the Depar tment of Genetics and Plant
Breeding during Kharif 2011 in a factor ial randomized block design with four replications.
The estimates of crop sown on 30
th
April unde r protected (sprayed) conditio ns were the most
ideal for control of leaf cur l virus disease. It exhibited stable per formance of the cultivar RASI 134 for
dry matter accumulation, leaf area index, number of branches and bolls plant
- 1
, boll weight and seed
cotton y ield also. Correlation study revealed that leaf curl virus disease was signif icantly and positivel y
cor related with suns hine hours, vapour pressure def icit at evening and negativel y signif icant with
minimum temperature, relative humidity at evening, wind speed and vapour pressure def icit at morning
in both growing e nvironments.
The regression analysis suggested that maximum var iability in leaf cur l virus disease can be
explained upto 81 percent by vapour pressure def icit at morning for RASI 134 and accuracy could be
improved with addition of wind speed. The inte nsity of leaf cur l disease was found in HS 6 as
compared to MRC 6304 and RASI 134, due to succulent broad leaves and none of the genoty pes was
resistant to leaf cur l virus disease.
Description
Keywords
Cotton, Diseases, Crops, Sowing, Relative humidity, Environment, Yields, Planting, Developmental stages, Environmental degradation