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VOL. 6, ISSUE 3 (2024)
Evaluating of intercropping system onion with cabbage and insect predators for reducing insect pests infesting onion and cabbage plants
Authors
Aml B Abou El-Kassem, HM Hassan, Aneesa S Sadek
Abstract
Agricultural practices such
as intercropping and trap cropping are used to manipulate or reducing pest
populations with less reliance on chemical means. The experiments were carried
out at Sakha Agricultural Research Station Farm. Kafr El-Sheikh Governorate
during 2022/2023 and 2023/2024 seasons, to evaluate the effect of intercropping
system on insect pests infesting cabbage intercropped with onion and their
associated predators. In the first season, Population abundance of Thrips
tabsci. on onion and cabbage crops exhibited three peaks on onion
with 335, 757 and 1173 larvae and adults/10 plants on 13 February, 17 March,
and 3 April, respectively. While on cabbage they were 475, 771 and 515 larvae
and adults / 10 plants on 13 February, 9 March, and 3 April. Respectively. In
the second one, the data took the same trend, while the total numbers of T.tabaci
on onion plants was higher than cabbage plants the highest monthly average
number on onion intercropping with cabbage was found in March in the first
season. While in the second one, was in February and March.The least population
of T. tabaci was noticed in plant density ratio of, 1onion: 4cabbage;
4249 and 3369 individuals in the first season, while 2217 and 1185
individuals.in the second one. This is due to that onion intercropping system
was found to have repellent effects and cabbage Plants physically impede the
pest insect's movement. Also, ratio of 1 onion: 1 cabbage reduced the rate of
infestation of cabbage by Pieris rapae, aphids, Plutella maculupennis,
and Nezara viridula. Population denisty of insect predators was higher at
intercropping system (polyculture) than in monoculture system.
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Pages:81-88
How to cite this article:
Aml B Abou El-Kassem, HM Hassan, Aneesa S Sadek "Evaluating of intercropping system onion with cabbage and insect predators for reducing insect pests infesting onion and cabbage plants". International Journal of Agriculture and Plant Science, Vol 6, Issue 3, 2024, Pages 81-88
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