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Biology of Chilo partellus (Swinhoe) on promising maize genotypes and evaluation of different management practices

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Title Biology of Chilo partellus (Swinhoe) on promising maize genotypes and evaluation of different management practices
 
Creator Chaubey, Ajai Kumar
 
Contributor Mehla, J.C.
 
Subject Biology, Chilo partellus (Swinhoe), Intercropping, Insecticides, Seed treatment, Foliar spray, Deadhearts
 
Description Studies on biology and management of Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae) on
promising maize genotypes, which included both high quality protein maize (HQPM) hybrids and
inbred lines, were conducted during 2012 in the laboratory as well as at research form of Regional
Research Station, Uchani (Karnal) of CCS Haryana Agriculture University, Hisar, Haryana, India. For
studying biology of the pest, maize plants were inoculated with the eggs of C. partellus reared in the
laboratory and observations on duration of different development stages and fecundity of the pest on
different genotypes were made. Effect of date of sowing; intercropping of maize with cowpea; seed
treatment and foliar application of different insecticides on the pest incidence and grain yield in
HQPM-1 was evaluated. The results indicated that larval duration was minimum (18.8± 0.5 days) on
the genotype Basi Local, followed by that on HK 1-1054-4 (19.3±0.6), days, while it was maximum
(29.1±1.1 days) on HM-4, followed by HQPM-1 (28.1±0.9 days), HK1-586-3 (28.1±0.9 days), HK 1-
170 (1+2) (27.2±0.8 days), HK 1-193-I (26.6±1.1) and HQPM-4 (26.4±0.8 days). However, no
significant differences in pupal and adult duration were recorded among different genotypes. Amongst
the three dates of sowing, minimum percentage of plants were damaged in the crop sown at the normal
date (10.0) as compared to early (42.3) and late sown crop (25.9) Likewise, lowest percentage of plants
with dead-hearts was observed in the normal sown crop (1.3) as compared to early (9.5) and late sown
(4.8) crop. Significantly lower plant damage and dead-hearts were recorded when maize crop was
intercropped with cowpea than the sole crop. Dead-hearts were minimum when intercropping was done
in ratio of two rows of maize + one row of cowpea (4.8 %) than that done with three rows of maize +
one row of cowpea (7.5 %) and sole crop (15.5 %). Similar trend was observed with respect to per cent
plant damaged. Among different treatments involving seed treatment, minimum percentage of deadhearts
was recorded when seed treatment was done with Gaucho 70 WS (4.9). Among foliar sprays,
thiodicarb (Larvin 75 WP) at different doses recorded minimum (0-0.6 %) dead-hearts.
 
Date 2016-09-12T09:22:55Z
2016-09-12T09:22:55Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76374
 
Language en
 
Format application/pdf
 
Publisher CCSHAU