Plants weeds

Erautt n. (pi. Erauter). herb, plant weed top (of beets, etc.) cabbage. 

Early Neolithic peoples domesticated the more productive local plants, cared for them m densely planted plots, protected them from animals and other plants (weeds) and haiwested the results. Likewise they tamed, bred and cared for local animals and ate them as they deemed fit. In the cases of cattle, horses, sheep and goats, milk and its products became staple foods. In some places larger domestic animals became beasts of burden. For very sound ecological reasons, agriculture allowed even early farmers to lib-... 

Forney, D.R. and D.E. Davis. 1981. Effects of low concentrations of herbicides on submersed aquatic plants. Weed Sci. 29 677-685. 

How quickly and to what extent an organism is able to reduce the concentration of an active chemical at the site of action is a major determinant of toxicity. Thus, differences in the capability of receivers to detoxify an active chemical is of major importance for selective action of allelochemlcals. Selective toxicity will also be Important if allelochemlcals are to be put to practical use. For example, if allelochemlcals are to be used as herbicides, the compounds will have to be toxic to some plants (weeds) but not toxic to others (the crop). Such selective toxicity could be accomplished if the crop, but not the weeds, had the ability to convert an administered allelochemical to nontoxic products. 

Sun-cured lucerne is the aerial portion of the plant. According to the North American feed regulations the traded product has to be reasonably free of other crop plants, weeds and mould, and is sun-cured and finely ground. 

Stevens, O.A. (1957). Weights of seeds and numbers per plant. Weeds 5 46-55. 

This comprehensive biological and economic study for the field com and sorghum sectors included large amounts of data to give separate cost estimates if atrazines or triazines were not available. University weed scientists efficacy ratings on all major herbicides on all weed species, unit costs of all herbicides and cultivation treatments, acres or hectares planted, weed densities, and current herbicide use patterns were compiled for each of the 10 USDA production regions as described by Ciba Crop Protection (1995) and Bridges (1998). Almost 5000 university and Ciba Crop Protection field trials were compiled in these analyses. 

Larson, R.P. and S.K. Ries (1960). Simazine for controlling weeds in fruit tree and grape planting. Weeds, 8 671-677. 

Lay them over the row or bed, leaving enough slack to allow plants to grow underneath. Anchor the edges with soil, rocks, boards, bricks, or other heavy objects. You can make or buy hoop supports for delicate crops like baby lettuce that may be damaged by abrasion. Later, remove the covers temporarily to thin plants, weed, or harvest. In the spring, periodically check for aphid infestations. 

Plant was amongst other plants (weeds and grasses) and was in flower. Some of the leaves did not look overly healthy—it was late in the season. Purpose of contact was just to converse. 

One of the most important characteristics contributing to the value of herbicides has been plant selectivity. The fact that some plants (weeds) are killed by herbicides while others (crops) are naturally resistant has been very important to selective weed control in crop production. A few herbicides that have been useful without natural or biological resistance, such as glyphosate and paraquat, have found great success in crop production due to the use of other methods of selective weed control (e.g., directed applications, applying prior to crop emergence or applying to dormant perennials). 

Keep the plants weed-free, but hoe carefully as they have shallow roots. 

Geissbiihler, H., C. Haselbach, H. Aebi, and L. Ebner. The Fate of A/ -(4-Chlorophe-noxy)pheityl-A/,V-dimethylurea HI. Breakdown in Soils and Plants, Weed Res., 3(4) 277-297 (1963a). 

Stored food products are high-value items that have been planted, weeded, watered, fertilized, harvested, processed, transported, and stored in facilities, which also represent an investment. Since insect pests cause massive economic losses, strenuous efforts for detection and control of these pests are warranted and have been actively undertaken. Most of these pests are coleopteran or lepidopteran, and a number of pheromones have been identified in both orders (see reviews by Burkholder 610) and Levinson 611)). 

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