Prediction of cotton yield depending on sowing date and period of bollworms control [electronic resource].

Includes reference.

The present study was carried out at Sharkeia Governorate, during cotton growing :,seasons of 2001 and 2003, to investigate the relation between both sowing dates and insecticidal protection periods for controlling bollworms, and their effect on cotton yield. Five experimental fields representing five sowing dates, starting from March to Apni 30 (With 10 days intervals), were selected for this study.Seven periods of Insecticidal-protection applications (25,31, 37 43, 49, 55 and 61 days) were used per each sowing date. Five replicate areas, of 200 m² each, were selected to estimate cotton yield for each combination between sowing dates and protection periods.

Summary in arabic.

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