ATTEMPTS TO CONTROL EXCESSIVE VEGETATIVE GROWTH OF COTTON | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 17, Volume 78, Issue 3, September 2000, Page 1181-1193 PDF (3.11 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2000.322690 | ||||
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| Author | ||||
| MOHAMED I. M. EI-SHAHAWY | ||||
| Cotton Research Institute, Agricultural Research Centre, Giza, Egypt | ||||
| Abstract | ||||
| Two field experiments were carried out at Sakha Agricultural Research Station during 1997 and 1998 seasons, using the Egyptian cotton cultivar Giza 87 (G. barbadense L.) to study the effect of some cultural treatments in order to check excessive vegetative growth i.e. topping at 120 days age, spraying 8 kg/fed. super phosphate (15% P2 05) on mid-July and 15 days later, spraying Pix (mepivat chloride) 500 ml/fed. (50 gm a.i/L) twice in the beginning of squaring and 15 days later and single spray of Pix at the beginning of squaring +topping at 120 days age, besides untreated control. The results indicated that the different treatments significantly affected all the studied characters compared to the control except number of fruiting sites whereas they reduced final plant height, main stem internodal length. monopodia. sympodia, aborted sites and unopen bolls/plant. In general the studied treatments increased boll retention, earliness percentage, number of open bolts, boll weight, lint percentage, seed index and seed cotton yield (Kintar/fed.). The main prominent effect was detected with single spray of Pix + toping followed by two sprayings of Pix specially for seed cotton yield and its components. | ||||
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