Effect of ethylene on yield and some chemical constituents on cotton

Abstract EN

The investigation was carried out during 2003 and 2004 seasons, where seeds of Brakat-90 cotton variety was sown in pots.

Plants were treated with ethrel at start and at maximum of flowering at different concentrations, (0, 5, 10 and 20 ppm).

The results revealed that the application of ethrel increased number of flowers and boll / plant, yield and earliness in two seasons when applied at both stages.

The results showed that lower concentrations (5, 10 ppm) increased micron ire value when applied at start and at maximum of flowering in two seasons.

While 20 ppm decreased micron ire value in plants treated at both stages during 2003 and 2004 seasons.

It is clear from the results that the lint percentage was highest in plants treated at start of flowering with 10 and 20 ppm at 2003 and 2004 seasons respectively.

The present investigations showed that weight of 100 seeds in general was higher in ethrel treated plants especially at maximum of flowering stage.

The results also revealed that the application of 10 ppm tended to increase all chemicals studied at both stages of flowering especially carbohydrate and total amino nitrogen.

Spraying ethrel at rate of 10 and 20 ppm was most active in increasing characters.