RESPONSE OF COTTON CULTIVAR GIZA 83 TO FOLIAR APPLICATION OF ETHREL (ETHEPHON) IN LOW CONCENTRATIONS UNDER LATE PLANTING CONDITIONS | ||
| Journal of Plant Production | ||
| Article 7, Volume 28, Issue 8, August 2003, Pages 5945-5955 PDF (7.29 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2003.244792 | ||
| Author | ||
| M. M. A. Kassem, | ||
| Cotton Research Institute, Agric. Res. Center, Giza, Egypt. | ||
| Abstract | ||
| The present study was carried out at Mallawi Agric. Res. Station, Minia, in 2001 and 2002 seasons to study the effect of foliar application of ethrel (ethephon) in low concentrations (0, 10, 20 and 40 ppm) at squaring stage or at early flowering stage on late sown cotton plants of Giza 83 cultivar. The obtained results showed that, in comparison with the control, ethrel tended to decrease plant height, leaves content of chlorophyll and number of days to first open boll with increasing the reduction in Ihese traits as ethrel concentration increased. On the other hand, aU ethrel concentrations, In generat, increased leaves content of sugars, number of sympodla, flowers, and open bolls per plant, boll relenlion%, ear1iness%. and seed colton yield per faddan, however, all of these traits were significantly increased over the control only by 10 or 20 ppm which gave Ihe highest yield and the best results in general. Fiber properties were not affected by ethrel treatments. Both time of application and the interaction between time of application and elhrel concsntration had almost no rnarxed affects on plant growth and yield. It could be concluded that treatment of late sown cotton plants with 10 or 20 ppm of ethrel at either squaring stage or early flowering stage improved the plant fruiting performance and yield under lale planting conditions. | ||
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