Seasonal Incidence and Management of Aphids in Cumin, Cuminum cyminum L.
Loading...
Date
2021-10-08
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Agriculture University, Jodhpur
Abstract
The investigations on “Seasonal Incidence and Management of aphids in
Cumin, Cuminum cyminum Linn.” were carried out during Rabi, 2020–21 at
Instructional farm, College of Agriculture, Jodhpur. The infestation of aphid
population commenced in the third week of December (51st Standard Meteorological
Week) which reached its peak (115.03 aphids/ 3 umbels) in fifth week of January
(5th SMW) and gradually declined thereafter.
The aphid population had negative non-significant correlation with the
maximum temperature (r= –0.336) and minimum temperature (r= –0.465). Whereas,
positive non significant correlation with relative humidity (r= 0.343).
The maximum peak infestation of aphid population (106.50 aphids/ 3 umbels)
was seen on late sown crop i.e. 7th December followed by 30th November (98.50
aphids/ 3 umbels) and 23rd November (96.50 aphids/ 3 umbels) crop. While, the
minimum peak infestation (68.00 aphids/ 3 umbels) was recorded crop sown on 26th
October followed by 2nd November (71.00 aphids/ 3 umbels), 9th November (75.00
aphids/ 3 umbels) and 16th November (83.25 aphids/ 3 umbels) sown crop.
The standard check i.e., imidacloprid 17.8 SL (0.01%) proved most effective
against aphid followed by entomopathogenic fungi viz., Verticillium lecanii 1.15 WP
@ 5 g/l (1 x 108
CFU/g), Metarhizium anisopliae 1.15 WP @ 5 g/l (1 x 108
CFU/g)
and Beauveria bassiana 1.15 WP @ 5 g/l (1 x 108
CFU/g). However, these differed
significantly with standard check. Whereas, neem products viz., Azadirachtin 10,000
PPM and Azadirachtin 3,000 PPM were proved least effective against aphid.
The maximum seed yield of 7.78 q/ ha was obtained in the plots treated with
imidacloprid 17.8 SL. The total avoidable loss and per cent avoidable loss was found
to be zero in the treatment of imidacloprid 17.8 SL which was used as standard check,
whereas, maximum avoidable loss was obtained in Azadirachtin 10,000 PPM. The
highest incremental cost benefit ratio of 1:16.89 was obtained in the plots treated with
imidacloprid 17.8 SL followed by Verticillium lecanii 1.15 WP (1:7.18), Metarhizium
anisopliae 1.15 WP (1:6.63) and Beauveria bassiana 1.15 WP (1:6.03
Description
Keywords
Citation
Choudhary Nisha 2021. Seasonal Incidence and Management of Aphids in Cumin, Cuminum cyminum L.. M.Sc. thesis, College of Agriculture, Agriculture University Jodhpur