Grass control

Paraquat applications to spruce plantations for grass control had no effect on the movement or density of field mice (Microtus arvalis) and voles (Microtus agretis), but shrews (Sorex sp.) migrated from treated areas to untreated ones (Summers 1980). 

One of the major problems in rice production is grass control. Various grasses compete with rice and drastically reduce yields. Results of preliminary experiments in Venezuela (9) indicate that rice yields may be increased by the application of dinitrophenol as a pre-emergence herbicide, even though rice stands are reduced by this chemical. Additional research is needed in this field, as the possibility exists... 

This application was made between 0700 and 0830 a.m. in cool (air temp., 10 0 clear and windless weather. Both granular and emulsion formulations were incorporated to the 7.5cm depth with a disc cultivator within 15 minutes of application. A second cultivation to the same depth, but at right angles to the first, was completed within 2-3 hours. On May 20th both plots were spring-tooth harrowed for seed-bed preparation for soybean planting on the same day. The only subsequent soil disturbance was a row cultivation in late June to control a severe infestation of quack-grass control of broadleaf weeds was essentially complete with the trifluralin. 

Because of the Importance of weed parts as a trash component, weed and grass control during the production phase is extremely Important. It may be concluded (12) that if there is grass in the field, there is likely to be grass in the fiber. Broad-leaf-weed and grass control in the field provide, therefore, the first effective opportunity available to reduce the foreign matter content of ginned fiber. 

As atrazine went beyond trial use, farmers, dealers, and custom applicators hne-tuned application practices. In an effort to decrease cost and soil carryover potential, atrazine rates were decreased. Farmers moved from band to broadcast applications to achieve greater efficiency. They also sought maximum weed control by using atrazine in mixtures, especially for better grass control, tailored to each agricultural situation. 

Aasheim (1948) at Havre, Montana, was among the first to reduce tillage trips in a wheat stubble fallow by using chemicals to control weeds. He used 2,4-D and dinoseb, applied in water or diesel fuel, calling this practice chemical fallow. Later, dalapon replaced dinoseb to obtain better grass control (Baker et al., 1956). 

DelBosco, G.F., A. DeMichele, and B. Baratta (1974). Chemical weed control in Sicilian citriculture. In D.P.H. Tucker and R.L. Phillips, eds., Perennial Grass Control in Florida Citrus Groves. Murcia, Spain Ministerio de Agriculture, pp. 357-359. 

Tucker, D.P.H. and R.L. Phillips (1973). Perennial grass control in Florida citrus groves. Proceedings of International Society of Citriculture. pp. 337-340. 

Balneaves, J.M. (1982). Grass control for radiata pine establishment on droughty sites. New Zealand J. Forestry, 27(2) 259-276. 

DSMA is an organic arsenical having contact, postemergence activity. It was first utilized for crab-grass control in turf. It is an effective herbicide in cotton and in citrus trees, but must be used as a directed spray to avoid contact with the crop foliage. 

Selective herbicide with broad spectrum grass control and control of some broad leaved weeds in maize, soybeans, sunflower, wheat, rice... 

Table II. Combinations of herbicides for grass control in corn at Clay Center, 1986-89. Evaluations were made about four weeks after planting...

Paraquat is a toxic chemical that is widely used as an herbicide (plant killer), primarily for weed and grass control. 

Isoxaflutole - Herbicide for broadleaf weed and grass control in maize and sugar cane. Technical Information , Bayer CropScience AG, Alfred-Nobel-Str. 50, 40789 Monheim. 

Tetrazolinones were relatively unknown in herbicide chemistry until 1985, when Uniroyal Chemical applied for a patent describing the herbicidal action of carbamoyl tetrazolinones [21]. Several companies have explored this chemistry, and in 1999 Bayer CropScience launched the first practical tetrazolinone herbicide, Ten-trazamide, for grass control in rice (Fig. 8.5). 

Grasses % Control at 8 Broadleaves Soybean ka/ha Cotton Corn Wheat... 

Wall, D.A., 1994a, Huazifop-p tank-mixtures with clethodim for annual grass control in flax (Unum usitatissimum). Weed Tech. 8, 673-678. 

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