مقارنة فعالية بعض المبيدات العشبية في مكافحة عشبه الحليان halepense (L.)‎ Sorghum في حقول القطن في مراحل نموه المختلفة وتأثيرها على الإنتاجية

الملخص EN

A field study was carried out to compare the efficiency of three herbicides in three concentrations for controlling Sorghum halepense (L.) in three periods of plant development.

Results showed superior effects of herbicides : * In 5 - 6 leaves period: For Fusilade 25% EC Focus ultra l0%EC Super Gallant 12.5%EC in the concentration of 3.5 c /L., 7.5 c /L, 7.5 c /L the mortality percentages were: 96, 100, 100% and roductivity 4155, 4853,4750 kg/h in comparison with 135 kg/h for control as with economic useifulness: 68.90, 72.80, 73.47%, respectively.

* In 25- 40 cm period: Mortality percentages were: 95, 100, 100% and productivity: 3954, 4503, 4536, kg/h in comparison with control (125kg/h) economic usefulness: 67.30, 70.68: 72.22%, respectively.

*In Florescence period: Mortality percentages were: 94, 97, 97% and productivily: 3654, 3987, 3854 kg/h in comparison with control (120.6kg/h) and Economically usefulness: 64.

64., 66 .

89 : 67.

30% respectively.

Study showed that three herbicides were effective against Sorghum halepense (L.) In 5-6 leaves and 25 – 40 cm periods and less effective in the Florescence period Focusultra was effective in all of periods.

Also productivity and economic usefulness were higher with Sorghum halepense control in 5-6 leaves and 25–40 cm period and less effective in Florescence period.