Phenology of weeds in wheat as influenced by weed control.
The results are given of a study of the phenological development of weeds in wheat cv. HD 4530 on irrigated plots receiving a number of herbicide treatments. Spergula arvensis and Convolvulus arvensis started germinating 8-10 days after sowing, whereas Phalaris minor, Fumaria parviflora and Melilotus indica germinated after irrigating wheat 21 days after sowing at its crown root initiation stage. F. parviflora, P. minor and S. arvensis matured earlier than the wheat and shed their seed on the soil. M. indica and C. arvensis matured with the crop and their seed contaminated the wheat grain. The effect of the individual herbicide treatments on weeds is discussed in relation to their phenological behaviour.