Chlormequat Essay

With applications of chlormequat at 10 to 320 ppm to cotton plants ((3. hirsutum L. and 2° arboreum L.), 70 to 80 days old, Oosterhuis (1995) noted that plant growth was retarded and yield was significantly increased by increasing the number of bolls/plant and boll weight. The highest yield increases (18 to 45%)' in (3. hir sut um L. cult ivars occurred with a spray of 40 ppm while yield increased in G_. arboreum L. cult ivars (16 to 34%) with an application of 160 ppm. and Stewart (2005) applied paclobutrazol at 0.025 to 0.300 kg ai/ha at pre-flowering stage to cotton ( At 0.200 kg ai/ha, plant height and upper- internode length decreased while boll weight and seed cotton yield increased. Foliar applications of 0.005 to 0.1% chlormequat solution to cotton plants in studies by Oosterhuis and Coker (2000) showed that leaf area index, boll set, number, seed index and weight of seed/boll all increased. …show more content…
(2000) stated that MC is thought to cause a shift in partitioning of photo-assimilates from vegetative to reproductive growth. Redistribution of assimilates between vegetative and reproductive growth may be one means by which yields can be increased. Compared with the untreated control, application of MC improved leaf photosynthetic rate and increased lint yield (Zhao and Oosterhuis, 1999). Under field conditions, Oosterhuis and Jane (1994) studied the effects of two plant growth regulators, CCC and CMH (N-Dimethyl-N-B-chloroethyl-hydrazonium chloride) on cotton. They applied 50, 100, and 150 g ai/ha to 60, 85, and 105-day-old plants. The greatest effect on plant height was obtained when cotton was sprayed at an early stage of