Effects of 2,4-D and GR 24 on seeds germination of witchweed (Striga hermonthica (Del.) Benth.)
2008
Dafaallah, A.B., University of Gezira, Wad Medani (Sudan), Faculty of Agricultural Science, Dept. of Crop Protection | Hamdoun, A.M., University of Gezira, Wad Medani (Sudan), Faculty of Agricultural Science, Dept. of Crop Protection | Babiker, A.T., Agricultural Research Corporation, Wad Medani (Sudan), Weed Science Section
Five laboratory experiments were conducted during April 2006 in Wad Medani, Sudan to study the effects of 2,4-D at 2.5-10011M during pre-conditioning and10n pre-conditioned witchweed seeds, simultan¬eously with, prior to, or after GR 24 at 0.001, 0.01 or 0.1 ppm on germination of witchweed seeds. The results revealed that application of 2, 4-D at the concentrations tested at conditioning or simultaneously with GR 24 on pre-conditioned witchweed seeds significantly suppressed ' germination. However, it stimulated the germination of pre-conditioned seeds. When 2,4-D or GR 24 were applied 3-24 h prior to the application of the other, germination and abnormal germination of witchweed seeds progressively increased with increased period prior to their application
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