Mohammed Jurial Baloch
Cotton Research Institute Sakrand, Nawabshah, Sindh, Pakistan
Abdul Rahim Lakho
Cotton Research Institute Sakrand, Nawabshah, Sindh, Pakistan
Hidayatullah Bhutto
Cotton Research Institute Sakrand, Nawabshah, Sindh, Pakistan
ABSTRACT
Larger and wider floral bracts provide good shelter to bollworms to safely feed-upon cotton bolls whereas smaller, narrower and twisted bracts provide less protection to bollworms. Variation in normal bract size and their relationship with bollworm damage was studied in several upland cotton varieties. Our results suggest that generally varieties with larger bracts sustained more damage as compared to varieties with smaller bracts. However, in some cases where varieties with even smaller bracts received more damage due to close fruit bearing behaviour of particular varieties that probably favoured bollworms to easily reach the bolls to feed-upon
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How to cite this article
Mohammed Jurial Baloch, Abdul Rahim Lakho and Hidayatullah Bhutto, 2001. Bract Size in Relation to Bollworm Damage in Upland Cotton Varieties. Pakistan Journal of Biological Sciences, 4: 986-987.
DOI: 10.3923/pjbs.2001.986.987
URL: https://scialert.net/abstract/?doi=pjbs.2001.986.987
DOI: 10.3923/pjbs.2001.986.987
URL: https://scialert.net/abstract/?doi=pjbs.2001.986.987
REFERENCES
- Ahuja, S.L., S.K. Banerjee, S. Jagmail and J. Singh, 1998. Genotype x environment interaction of morphotypes in cotton (Gossypium hirsutum L.). Indian J. Agric. Res., 32: 93-100.
Direct Link - Green, J.M., 1955. Frego bract, a genetic marker in upland cotton. J. Hered, 46: 232-232.
Direct Link - Nyambo, B.T., 1985. Cotton insect resistance studies in the western cotton growing area of Tanzania. Insect Sci. Applied, 6: 379-384.
Direct Link - Parrot, W.L., J.N. Jenkins and D.B. Smith, 1973. Frego bract cotton and normal bract cotton: How morphology affects control of boll weevils by insecticides. J. Econ. Entomol., 66: 222-225.
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