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SCREENING OF ROSE GENOTYPES AGAINST THRIPS, Scirtothrips dorsalis HOOD (THYSANOPTERA: THRIPIDAE) AND ITS MANAGEMENT

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Title SCREENING OF ROSE GENOTYPES AGAINST THRIPS, Scirtothrips dorsalis HOOD (THYSANOPTERA: THRIPIDAE) AND ITS MANAGEMENT
ಥ್ರಿಪ್ಸ್ ನುಶಿ (ಸಿಟ್ರೋಥ್ರಿಪ್ಸ್) ಬಾಧೆಯ ವಿರುದ್ಧ ಗುಲಾಬಿ ತಳಿಗಳ ಪರೀಕ್ಷೆ ಮತ್ತು ಅದರ ನಿರ್ವಹಣೆ
 
Creator H. R., NIRMALA
 
Contributor NARABENCHI, GANGADHAR
KOTIKAL, Y. K.
PATIL, SATISH R.
D., SATISH
S., RAGHAVENDRA
 
Subject Horticulture Entomology
Rose
Thrips
 
Description An investigations on screening of rose genotypes against incidence of
Scirtothrips dorsalis Hood under naturally ventilated polyhouse condition, identifying
resistant sources and efficacy of new molecules of insecticides against thrips were
undertaken during the year 2014-2015 at the Department of Entomology, College of
Horticulture, Bagalkot, Karnataka. Eleven genotypes were screened against thrips
under naturally ventilated polyhouse condition. Amongst them, Prettybride, Nobless,
Shakira, Bugati and Tropical were found to be superior by recording significantly
lesser level of thrips incidence. Whereas, Grandgala found to be inferior genotype by
recording higher level of thrips incidence as compared to other genotypes screened.
Further, categorization of rose genotypes based on their reaction to thrips incidence
on rose plants indicated that the Prettybride was categorised as highly resistant
genotype, Goldstrike, Shakira, Bugati, Avalench and Tineke as resistant genotypes,
Samurai, Tropical, Nobless and Bourdeux as susceptible and Grandgala as highly
susceptible genotype. Among different biophysical and biochemical traits identified
as sources of resistance to thrips, the genotypes categorised as highly resistant and
resistant had lesser leaf area, lesser leaf thickness, higher trichomes density, lighter
coloured flowers, moderate sized flowers, more flower compactness, lesser amount of
sugars and higher level of phenol contents as compared to the genotypes which were
categorized as susceptible and highly susceptible. The traits such as lesser leaf
thickness, lesser leaf area, lesser sugars and light coloured flowers are proved
important traits for breeding thrips resistant genotypes in future. Among the different
insecticides evaluated against thrips on rose in open field condition, Imidacloprid
30.50 SC (0.3 ml/L) and Diafenthiuron 50 WP (1 ml/L) were found to be superior
over the other chemicals in reducing the population of thrips and obtaining maximum
net returns as compared to other chemicals tested.
DEPARTMENT OF HORTICULTURE ENTOMOLOGY
COLLEGE OF HORTICULTURE, BAGALKOT
 
Date 2017-01-17T12:05:46Z
2017-01-17T12:05:46Z
2015-06
 
Type Thesis
 
Identifier UHS13PGM358
http://krishikosh.egranth.ac.in/handle/1/96586
 
Language en
 
Format application/pdf
application/pdf
 
Publisher University of Horticultural Sciences, Bagalkot