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Biology of Sapota Seed Borer Jrymalitis Margarias Meyrick (Tortricidae : Lepidoptera) and Evaluation of Some Insecticides for its Management

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Title Biology of Sapota Seed Borer Jrymalitis Margarias Meyrick (Tortricidae : Lepidoptera) and Evaluation of Some Insecticides for its Management
 
Creator Makwana, Dikshitbhai Manubhai
 
Contributor Patel, Z. P.
 
Subject null
 
Description Investigations on the nature of damage, biology as well
as natural enemies of sapota seed borer Trymalitis margarias
Meyrick
(Tortricidae:
Lepidoptera)
were
carried
out
at
Department of Entomology, N.M. College of Agriculture, Navsari
during 2001. While, seasonal incidence based on three different
survey works was carried out in Dahanu area of Maharashtra and
Navsari as well as Valsad districts of south Gujarat. Moreover,
field evaluation of insecticides against T. margarias was carried
out in farmer's orchards at village Panar and Masawadi of
Navsari district during 2001.
The neonate larva preferred medium size fruits to enter
into the seed by making a zigzag gallery on seed. The' larva feeds
exclusively on endosperm of seed and completed its larval periodtherein, due to which an average seed weight loss of 52.13 +
11.66 per cent occurred.
The biology
of sapota seed borer,
T.
•
margarzas
indicated that the incubation period varied from 9 to 12 days,
while the total larval period and pupal period was completed in
10 to 13 days and 9 to 12 days respectively. Fema Ie moth was
distinguished by having widely opened abdomen. The female
moth laid 72 to 225 eggs during her life. The longevity of male
and female moths varied from 4 to 6 and 5 to 7 days, respectively.
The total life cycle from egg to the death of adult was completed
within 32 to 43 days and 33 to 44 days in case of male and
female, respective Iy.
Under field condition the larvae of T. margarias were
parasitized by two unidentified hymenopterous parasites. While,
pupae were parasitized by a hymenopterous parasite and also by a
parasitic mite.
Incidence of T. margarias started from July onwards
and continued till February with varying degree of infestation. As
high as 54 per cent of infested fruits were found damaged by the
pest, and more than 10 per cent infestation was recorded during
September to December. Based. on the biology of pest and
appearance of fruit hole, a management strategy was formulated.
Field
evaluation
of
insecticides
revealed
that
application of three sprays at 20 days interval with eitherpolytrin-C (a mixture of profenofos + cypermethrin) 0 .044 per
cent or lamda-cyhalothrin 0.0025 per cent or profenofos 0.075 per
cent or Koranda (a mixture of fenvalrate + acepha\e) 0.028 per
cent were found effective against the pest.
 
Date 2018-05-22T08:38:20Z
2018-05-22T08:38:20Z
2002-09
 
Type Thesis
 
Identifier MAKWANA DIKSHITBHAI MANUBHAI_33514
http://krishikosh.egranth.ac.in/handle/1/5810047066
 
Language en
 
Format application/pdf
 
Publisher Agricultural Entomology Department, N. M. College of Agriculture, Gujarat Agricultural University