Two field experiments were conducted during 2015/2016 and 2016/2017 seasons at Shandaweel Agriculture Research Station, Sohag Governorate, to study the effect of onion density and weed control treatments on vegetative growth, yield and quality of onion. Split plot design with three replicates was used. Onion plant density (240 000, 300 000, and 400 000 plant/ fed.) occupied the main plots, whereas weed control treatments (hand hoeing (twice), Goal + Select (once), Goal + Select (twice), Ecopart + Select (once), Ecopart + Select (twice) and control) occupied the sub plots. Onion plants grown under the highest density (400 000 plants/fed.) attained the highest values of plant height and number of leaves/plant, while the lowest density (240 000 plants/fed.) attained the lowest values, in both seasons. Total yield/fed. for onion grown under high density were higher than those under other densities. Planting onion at low density recorded the highest values of single bulbs%, and double bulbs%, while planting at high density recorded the lowest values, in both seasons. The highest values of number of leaves/plant and bulb weight were obtained by application of Goal + Select (twice), in both seasons. Average bulb weight, marketable yield/fed., culls yield/fed. and total yield/fed. were significantly decreased under weed control treatment, in both seasons. From this investigation, it could be concluded that using of the highest plant density (400 000 plant/fed.) and application of Goal + Select (twice) could be recommended for the highest values of gross income, net benefit and the percentage of benefit/cost ratio.

Two field experiments were carried out at Shandaweel Agricultural Research Station (latitude of 26 33° N and longitude of 31 41°E), Sohag Governorate, Egypt in 2018/2019 and 2019/2020 seasons to study efficacy of some integrated weed control treatments (removing or burning cane trash; hoeing and Ready Peck, Clomdi, Lumax, Garlone herbicides) on yield and quality of sugarcane 1 st ratoon of G.2003-47 variety (Giza-3). A randomized complete block design in a split-plot arrangement with three replications was used. The results showed that the removal of plant cane trash out of the field resulted in significant increases in millable cane height, number of millable canes, cane and sugar yields/fed of the 1 st cane ratoon crop. However, cane trash treatments had insignificant effect on weed traits, millable cane diameter and juice quality. The applied herbicides and hoeing (twice) negatively and significantly affected fresh, dry weight of both grassy and broad-leaved weeds and their total weight, compared to un-weeded plots. The applied herbicides and hoeing appreciably increased millable cane height, number of millable canes, sucrose%, sugar recovery%, cane and sugar yields. Hoeing was the most effective in weed eradication, resulting in higher sugarcane traits, compared with the other treatments. The effects of interactions among the studied factors on sugarcane and/or weed traits were discussed. Under conditions of the present study, the removal of trash of the plant cane crop out of the field, with hand hoeing twice can be concluded to attain the highest cane and sugar yields of 1 st ratoon cane crop.

300 mg/l) of L-phenylalanine or L-tryptophan each alone were foliar applied to milk thistle (Silybum marianum L.) plants to assess their effects on growth, productivity and chemical constituents. Obtained results demonstrated that the maximum values of plant growth characters (plant height, number of main branches, number of leaves /plant and herb fresh weight), yield components (number of fruits/plant, fruit weight, weight of 1000 seeds, seed weight/plant and seed yield/faddan) and chemical constituents (total nitrogen, phosphorus, potassium and total carbohydrates percentages in leaves as well as total phenolic compounds content of seeds) were recorded by spraying the plants with the highest concentration (300 mg/l) of each compound alone.