INFLUENCE STUDY OF GOSSYPOL, TANNIN AND SOME MORPHOLOGICAL TRAITS OF COTTON Gossypium spp FOR RESISTANCE THE COTTON BOLLWORM Earias insulana

Abstract

Laboratory and field experiments were conducted to determine theInfluence of some Leaves Morphological and Biochemical Traits of the morefamous cotton cultivars in Iraq (Ashure, Marsomy4, Coker and Lashata) to thecotton bollworm Earias insulana, also determined the Infection percentage topest and the yield losses. The Results Showed that the Largest meanconcentration of gossypol and tannin was 1.626, 0.559 mg/gm, respectively.Ashure C.V. was the most infected host by insect and the highest Infectionpercentage to insect was 13.31% because the least gossypol concentration 1.245mg/gm in the seeds of this C. V. while, the least Infection percentage to insect was9.62% on Coker C.V because the highest gossypol concentration 2.181 mg/gm inthe seeds of this C.V.The highest actual loss was 44.93 gm/plant in Ashure C.V. and the leastactual loss was 31.72 gm/plant in Coker C.V