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Bioecology and Management of Mite, Schizotetranychus baltazari Rimando (Acari: Tetranychidae) on Acid Lime

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Title Bioecology and Management of Mite, Schizotetranychus baltazari Rimando (Acari: Tetranychidae) on Acid Lime
 
Creator Praveen Kottalagi
 
Contributor S. B. Jagginavar
 
Subject Agricultural Entomology
 
Description Bioecology and management studies on acid lime mite Schizotetranychus baltazari
Rimando infesting lime were carried out during 2012-13 at college of Agriculture Bijapur.
From roving survey it was evident that in Northern Karnataka mite incidence was
severe with mean population of 317.98, 220.40, 117.4 and 0.55 per 20 leaves in Bijapur,
Gulbarga, Bagalkot and Belgaum districts respectively. Maximum number of grade I
marketable fruits were recorded from Belgaum and minimum was recorded in Bijapur.
Highest numbers of infested fruits were observed in Bijapur and least was observed in
Belgaum district.
Seasonal dynamics studied revealed maximum incidence of mites were recorded
during April and May months at Jumnal and Tadavalaga. The predatory mite was observed
in both locations. There was positive and significant correlation between mites and
temperature where as negatively significant negative relation with relative humidity and
rainfall. Maximum number of infested fruits observed in the month of April to May. Least
was observed during November.
In laboratory study the fecundity of S. baltazari reared on acid lime leaves was 55.75
? 10.37/eggs/female. The female and male longevity was 15.25 ? 0.56 and 8.58 ? 0.28 days
respectively. The period occupied by young stages was 13.31 ? 1.19 days.
Bio-efficacy studies showed that Spiromesifen 240 SC (0.50 ml/ l), Difenthiuron 50
SC (0.80gm/ l), hexythiazox 5.45 EC (1.5 ml/ l) and abamectin 1.9 EC (0.5 ml/ l) as highly
effective acaricides against acid lime mite. With two sprays, the mite incidence reduced from
22.13 to zero mites per leaf from Spiromecifen application which rendered 28.20 tonnes per
hectare lime yield. From Spiromesifen 240 SC and Difenthiuron 50 SC recorded the highest
yield and net profit.
 
Date 2016-11-23T13:57:41Z
2016-11-23T13:57:41Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/87234
 
Format application/pdf
 
Publisher UAS, Dharwad