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 |
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Creator |
H. R., NIRMALA
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Contributor |
NARABENCHI, GANGADHAR
KOTIKAL, Y. K. PATIL, SATISH R. D., SATISH S., RAGHAVENDRA |
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Subject |
Horticulture Entomology
Rose Thrips |
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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 |
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Date |
2017-01-17T12:05:46Z
2017-01-17T12:05:46Z 2015-06 |
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Type |
Thesis
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Identifier |
UHS13PGM358
http://krishikosh.egranth.ac.in/handle/1/96586 |
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Language |
en
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Format |
application/pdf
application/pdf |
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Publisher |
University of Horticultural Sciences, Bagalkot
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