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STUDIES ON BIO-ECOLOGY AND MANAGEMENT OF SUGARCANE EARLY SHOOT BORER (Chilo infuscatellus Snellen)

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Title STUDIES ON BIO-ECOLOGY AND MANAGEMENT OF SUGARCANE EARLY SHOOT BORER (Chilo infuscatellus Snellen)
 
Creator KALARIYA, GIRDHARLAL B.
 
Contributor RADADIA, G.G.
 
Subject dna, diseases, vegetables, livestock, planting, plant extracts, physical control, auxins, humus, ecosystems
 
Description Investigation was carried out during 2007-08 and 2008-09
regarding "studies on bio-ecology and management of sugarcane early
shoot borer (Chilo infuscatellus Snellen)" at Regional Sugarcane
Research Station, Navsari Agricultural University, Navsari.
The female of sugarcane early shoot borer laid 222 to 488 eggs in a
several masses on the ventral/dorsal surface of leaves close to the midrib.
The incubation period ranged from 4 to 6 days with an average of 4.76 +
0.66 days. The larva passed through five instars and total larval period
ranged from 19 to 24 days with an average of 21.36 + 1.32 days. Pupation
was inside stem in silken cocoon; and the pupal duration varied from 6 to
8 days with an average of 7.16 + 0.62 days. Total life cycle was
completed in 28.50 to 36.50 days with an average of 32.60 + 4.07 days.
The sex ratio of male to female was 1: 2.1.
The infestation of C. infuscatalus was commenced in the last week
of January (7th
weeks after planting) and coincided with germination stage
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of the sugarcane crop. The peak activity occurred from middle of April to
May with the highest per cent of dead heart (6.29) in 3rd week of April
(19th week after planting). The incidence was disappeared by middle of
June. The varieties viz., CoN 91132, Co 86032 and CoLk 8001 recorded
34.01, 31.35 and 47.23 cumulative per cent dead heart, respectively. The
incidence of C. infuscatellus showed significantly positive correlation
with minimum temperature, average temperature and sunshine hours.
The tillers and canes production was increased in mother shoot
infested clump of CoN 91132, Co 86032 and CoLk 8001 whereas, tillers
and cane production were decreased in mother shoot and tillers infested
clump of all other varieties observed. However, additional compensatory
tiller yielded shorter, thin and weak cane with poor juice quality and
sucrose content.
In the healthier cane, yield varied from 4.54 to 4.64 kg/clump
whereas, the mother shoot infested by early shoot borer at 60 days after
planting, the cane yield reduced to the tune of 17.34 to 13.96 percent over
healthy cane. The mother shoot and tillers infested clump showed
reduction in the yield up to 30.19 percent.
The CCS yield varied from 0.59 to 0.63 kg/clump in healthy cane
of CoN 91132, Co 86032 and CoLk 8001. When the mother shoot
infested by early shoot borer at 60 days after planting, decrease the CCS
yield up to range of 20.63 to 24.70 per cent over normal cane whereas,
the mother shoot and tillers infested clump reduced the CCS yield to the
tune of 37.43 to 30.19 percent.
The soil application of carbofuran 3G @ 1 kg a.i./ha at 30 and 60
DAP + RDF and soil application of cartap hydrochloride 4G @ 1 kg
a.i./ha at 30 and 60 DAP + RDF gave maximum protection against early
shoot borer. However, the highest cane yield (99.24 t/ha) was recorded in
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soil application of neem cake @ 1 t/ha at the time of planting + 125 per
cent RDF + mechanical control. It is also safe and eco-friendly treatment.
The higher commercial cane sugar yield was also registered in all three
management practices. The maximum net profit of Rs. 48360/ha was
recorded in T3 i.e., soil application of carbofuran 3G @ 1 kg a.i./ha at 30
and 60 DAP + RDF (BCR 1:9.90) and it was followed by T9 i.e., Soil
application neem cake @ 1 t/ha at the time of planting + 125 per cent
RDF + mechanical control (Rs. 43788/ha with BCR 1:4.57) and T6 i.e.,
soil application of cartap hydrochloride 4G @ 1 kg a.i./ha at 30 and 60
DAP + RDF (Rs. 41819/ha with BCR 1:10.45). Alternate use of above
management practices were found effective, economic and eco-friendly
for the management of early shoot borer.
Among fifteen early sugarcane genotypes, Co 97009 and CoSi
95071 were found less susceptible to early shoot borer under natural field
infestation. Similarly, out of fifteen midlate sugarcane genotypes, Co
0323, 2002 N 666 and CoM 0265 were less susceptible. The biometrical
parameters had a stronger influence on early shoot borer incidence but
there was no uniform pattern between early and midlate genotypes.
 
Date 2016-04-06T12:03:52Z
2016-04-06T12:03:52Z
2011-03
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65398
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari