Record Details

Biology of cryptolaemus montrouzieri mulsant and management of grapevine mealybug, maconellicoccus hirsutus (green)

KrishiKosh

View Archive Info
 
 
Field Value
 
Title Biology of cryptolaemus montrouzieri mulsant and management of grapevine mealybug, maconellicoccus hirsutus (green)
 
Creator P. M. Prasanna
 
Contributor R. A. Balikai
 
Subject Agricultural Entamology
 
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.
 
Date 2016-07-26T10:44:23Z
2016-07-26T10:44:23Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69852
 
Format application/pdf
 
Publisher UAS Dharwad