Biology of cryptolaemus montrouzieri mulsant and management of grapevine mealybug, maconellicoccus hirsutus (green)
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Title |
Biology of cryptolaemus montrouzieri mulsant and management of grapevine mealybug, maconellicoccus hirsutus (green)
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Creator |
P. M. Prasanna
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Contributor |
R. A. Balikai
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Subject |
Agricultural Entamology
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Description |
The investigation on ?Biology of Cryptolaemus montrouzieri Mulsant and management of grapevine mealybug, Maconellicoccus hirsutus (Green)? were conducted during 2009 to 2011. The C. montrouzieri took 3.68, 4.68, 5.80 and 5.58 days to complete first, second, third and fourth instar by feeding 3.02, 7.52, 47.03 and 83.75 mealybugs, respectively. Predatory adult male and female survived for 58.18 and 62.48 days by feeding 38.00 and 42.97 mealybugs, respectively. Among the prediction models developed, the model LW1=68.03 - 0.6X3 (X3 = morning relative humidity) could be used by substituting current week?s weather data, to predict mealybug population a week ahead. Seven predators four, two and one from coccinellids, dipterans and lepidopteran, respectively and twelve hymenopterans parasitoids were recorded on grape vine mealybug. The laboratory experiment showed that, biology and feeding potential of first, second, third and fourth instar and adult male and female of C. montrouzieri was more when fed on second instar than third instar mealybugs. With respect to biorational studied under laboratory and field conditions, the efficacy of neem (NSKE and neem oil) based botanicals mixed with adjuvants with or without entomopathogens were showed higher per cent mortality of different instars of mealybugs as compared to other botanicals tested. Whereas, the different insecticides tested on mealybug were found more effective, among them bifenthrin, imidacloprid 70 WG, imidacloprid 17.8 SL and dichlorvos were highly effective in recording per cent mortality on mealybugs under laboratory and field condition. Regarding grape fruit yield, the imidacloprid 70 WG recorded highest fruit yield (37.92 t/ha), followed by bifenthrin (37.21 t/ha) and imidacloprid 17.8 SL (36.21 t/ha). Among the biorationals, the application of NSKE @ 5% + Dhanuvit @ 1 ml/l (29.82 t/ha), neem oil @ 2% + FORS @ 5 ml/l + M. anisopliae @ 2.0 g/ l (29.69 t/ha) and neem oil @ 2% + Dhanuvit @1 ml/l (29.51 t/ha) registered highest fruit yield. |
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Date |
2016-07-26T10:44:23Z
2016-07-26T10:44:23Z 2013 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/69852
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Format |
application/pdf
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Publisher |
UAS Dharwad
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