EFFECT OF PENDIMETHALIN AND IAA TREATMENTS ON GROWTH, YIELD, CHEMICAL COMPOSITION OF COWPEA (Vigna sinensis L.) AND ASSOCIATED WEEDS AT NOBARYA | ||
| Journal of Plant Production | ||
| Article 12, Volume 29, Issue 7, July 2004, Pages 3969-3978 PDF (2.89 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2004.238689 | ||
| Authors | ||
| Sanaa A. Mohamed,; Sonaa H. Elgayar; Nadia K. Messiha | ||
| Botany Department, National Research Centre, Dokki, Cairo, Egypt. | ||
| Abstract | ||
| Two field experiments were conducted at the newly reclaimed sandy soil of Nobarya in 1998 and 1999 seasons to study the effect of using the herbicide Pendimethalin (Stomp) at the rate of (0.0,0.9 and 1.7 Ufed.) and 1M at (0.0,12.5- 25.0 and 50.0 ppm) as well as their different combinations on associated weeds, plant growth and yield components of cowpea plants in addition to the chemical composition of seeds. Pendimethalin alone or in combination with 1M significantly depressed the growth of weeds as compared with untreated plants. Treatment of Pendimethalin at the rate of (1.7 Ufed.) + 1M at (25 ppm) was effective in depressing the fresh and dry weight of total weeds at 50 and 75 days after sowing followed by Pendimethalin (0.9 Ufed.) + 1M at (25 ppm). On the other hand, 1M treatments alone were less effective. All Pendimethalin and 1M treatments caused significant increase in plant growth and yield characters. The results showed that the plant height, No. of leaves, branches, No. of pods, seed, dry weight of plant yield/plant, weight of 100 seed and seed yield (kg/fed.) were significantly increased by the application of Pendimethalin and 1M than the control treatment which produced the lowest values of seed yield. Total protein %, carbohydrate % as well as the content of N, P, K, Zn and Mn in cowpea seeds were increased by all treatments. The highest increase was recorded by Pendimethalin at (1.7 Ufed.) + 1M at (25 ppm). | ||
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