BIOLOGY AND LIFE TABLE OF PEA LEAFMINER Chromatomyia horticola (Goureau) ON SOME PEA VARIETIES
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Date
2017
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation on “Biology and life table of pea leafminer Chromatomyia horticola
(Goureau) on some pea varieties” was carried out during 2016-2017 in the Department of
Entomology, Dr. Y S Parmar University of Horticulture and Forestry, Nauni, Solan. Four different
pea varieties viz. ‘Pb-89’, ‘Solan Nirog’, ‘VL-3’ and ‘VL-7’ were selected to study the developmental
biology of the pea leafminer under laboratory condition. The incubation period was 2.04, 2.02, 1.92
and 1.88 days on ‘Pb-89’, ‘Solan Nirog’, ‘VL-7’ and ‘VL-3’ varieties, respectively. The larval period
was found to be minimum on ‘VL-3’ (5.93 days), whereas it was maximum on the ‘Pb-89’ (6.11
days) followed by ‘VL-7’ (6.02 days) and ‘Solan Nirog’ (6.01 days). The maximum pupal period was
found on ‘VL-3’ variety (9.44 days) while, it was minimum on ‘Solan Nirog’ variety (9.10 days). The
total developmental period of the pea leafminer was 17.05, 17.13, 17.25 and 17.26 days on ‘VL-7’,
‘Solan Nirog’, ‘VL-3’ and ‘Pb-89’ varieties, respectively. Significant variation in the fecundity of the
pea leafminer was found on four varieties. It was found to be highest on ‘Solan Nirog’ variety (249.80
eggs per female), while minimum on ‘VL-3’ variety (168.40 eggs per female). Life fertility tables
were constructed on ‘VL-3’ and ‘VL-7’ varieties. The highest value of the true intrinsic rate of natural
increase (rm) was observed in the ‘VL-7’ variety (0.1757 female per female per day) and was lowest in
‘VL-3’ variety (0.1517 female per female per day), thus indicating that the ‘VL-7’ variety is more
suitable for multiplication of the pea leafminer. The total phenol content was found to be maximum in
‘VL-3’ variety (21.20 mg per 100g leaves) whereas, it was minimum in the ‘Solan Nirog’ variety
(14.60 mg per g leaves). The variety (‘VL-3’) having higher total phenol content i.e. 21.20 mg per
100g leaves was found to have lower value of true intrinsic rate of natural increase (rm) i.e. 0.1517
female per female per day. Overall studies thus revealed that the ‘VL-3’ variety is found to be less
susceptible as compared to other varieties.
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