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Asian Journal of Plant Sciences
Year: 2004  |  Volume: 3  |  Issue: 5  |  Page No.: 539 - 543

Microclimatic Morphs and Plant Distribution Analysis of Cereal Aphids on Wheat

Ibrar-ul-Hassan Akhtar, Humayun Javed and Abdush Shakoor    

Abstract: Research was conducted at the experimental fields of the Crop Science Institute, National Agricultural Research Centre, Islamabad during winter 2003. Inqilab-91 wheat variety was sown under Randomized Complete Block Design with three replicates. Data were collected through visual count method weekly. Overall morphs distribution of all three species of aphid was significantly different during season 2003 on week basis (F12,103 = 26.052, P=0.000; F12,103=9.084, P=0.000; F12,103=9.307, P=0.000). Population of cereal aphid’s nymphs peaked to 38.005±1.904/plant during 11th week in March. Apterous population was peaked to 1.800±0.22/plant during 4th week in January and secondly peaked in 11th week in March (7.264±1.296/plant). Alates were peaked to 3.821±1.04/plant in 4th week in January. Cereal aphid morphs distribution showed highest percentage of nymphs (72.8%) > apterous (16.7%) and alates (10.6%). Cereal aphids preferred the leaf part (72.2%) of plant followed by spike (16.3%), flagleaf (5.9%) and stem (5.5%), respectively.

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