Morphological and bio-chemical properties of cotton varieties imparting resistance to leafhopper, Amrasca biguttula biguttula (Ishida)
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Authors
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A F M Rabiul Ahasan Midul
Department of Entomology, 2Department of Agronomy Faculty of Agriculture, Gazipur Agricultural University, Gazipur 1706, Bangladesh
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Hania Binta Aslam
Department of Entomology, 2Department of Agronomy Faculty of Agriculture, Gazipur Agricultural University, Gazipur 1706, Bangladesh.
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Habibur Rahman
Department of Entomology, Department of Agronomy Faculty of Agriculture, Gazipur Agricultural University, Gazipur 1706, Bangladesh.
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Nurunnaher Akter
Department of Agronomy Faculty of Agriculture, Gazipur Agricultural University, Gazipur 1706, Bangladesh.
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Md Shamim Hossain
Department of Entomology, Department of Agronomy Faculty of Agriculture, Gazipur Agricultural University, Gazipur 1706, Bangladesh
Keywords:
Leafhopper infestation, cotton varieties, trichome density, biochemical traits, host plant resistance.Abstract
Cotton (Gossypium hirsutum L.) productivity is severely constrained by sap-sucking pests, particularly leafhopper (Amrasca biguttula biguttula). Enhancing varietal resistance through key morphological and biochemical traits offers a sustainable and eco-friendly strategy for effective pest management. This study evaluated the resistance of eight cotton (Gossypium hirsutum Linn.) varieties (CB12, CB14, CB15, CB19,
CB20, CDB Tula M1, BC111, and BC113) against leafhopper infestation under field conditions in Gazipur Agricultural University, Bangladesh. Significant variation (p ≤ 0.05) was observed among varieties in terms of infestation levels, morphological traits, biochemical composition, and yield performance. Higher infestation was recorded in CB12 and CB19, whereas BC111 and CB14 exhibited comparatively lower susceptibility. Leafhopper attack significantly reduced starch and protein contents, indicating adverse effects on plant metabolism. Varieties with higher trichome density and SPAD values showed reduced infestation and better growth performance. Correlation analysis revealed strong negative relationships between leafhopper infestation and plant height, leaf number, chlorophyll content, and yield traits, while trichome density was
negatively correlated with pest population and positively associated with yield components. Among the tested varieties, BC113, CB14, and BC111 demonstrated superior yield and fiber quality under infestation conditions. The results highlight the importance of integrating morphological and biochemical traits in screening cotton varieties for leafhopper resistance, supporting sustainable pest management strategies.
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