Title of article
POPULATION DYNAMICS OF INSECT PESTS OF COTTON AND THEIR NATURAL ENIMIES
Author/Authors
ASHFAQ, SANA Khyber Pakhtunkhwa Agricultural University - Department of Entomology, Pakistan , KHAN, IMTIAZ ALI Khyber Pakhtunkhwa Agricultural University - Department of Entomology, Pakistan , SAEED, MUHAMMAD Hazara University - Department of Entomology, Pakistan , SALJOQI, AHMAD UR RAHMAN Khyber Pakhtunkhwa Agricultural University - Department of Plant Protection, Pakistan , MANZOOR, FARKHANDA Lahore college for women University - Department of Zoology, Pakistan , SOHAIL, KAMRAN Khyber Pakhtunkhwa Agricultural University - Department of Entomology, Pakistan , HABIB, KOMAL Khyber Pakhtunkhwa Agricultural University - Department of Entomology, Pakistan , SADOZAI, AMNA Agriculture Research Institute - Department of Entomology, Pakistan
From page
251
To page
253
Abstract
The present research work aimed to study the population dynamics of different insect pests of cotton and their natural enemies at the Research Farm of Agricultural University, Peshawar, Pakistan during 2009. Whitefly, Bemisia tabaci (Gennadius); aphids, Aphis gossypii (Glover); leafhopper, Amrasca biguttula biguttula (Ishida); leaf beetle, Cerotoma trifurcate (Forster); red cotton bug, Dyesdercus koenigii (Fabricius) were the major insect pests while ladybird, beetle Coccinella septempunctata (Linnaeus); spider, Dictyna sp. (Linnaeus) and ants, Solenopsis invicta (Buren) were the natural enemies recorded on cotton. Densities of insect pests and natural enemies peaked from June to October. Highest density of 5.78 tabaci leaf^-1 was recorded on 10th August, 2.61 gossypii leaf^-1 on 20th June, 6.56 biguttula biguttula leaf^-1 on 10th August, 0.89 trifurcate leaf^-1 on 30th August and 1.58 koenigii leaf^-1 on 9th October. The highest density of 1.42 C. septempunctata leaf^-1 on 10th August, 0.56 Dictyna sp. leaf^-1 on 19th September and 1.22 invicta leaf^-1 on 20th June were recorded. The pest and natural enemies completely disappeared after mid-October.
Keywords
Insect pests , natural enemies , cotton , population dynamics
Journal title
Sarhad Journal of Agriculture
Journal title
Sarhad Journal of Agriculture
Record number
2553609
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