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Organic & Integrated Tree Fruit Production

Tuesday, June 19, 2018

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Search results on 06/19/18

1335. Cleary, C.L. and T.F. Peeper. 1983. Effect of no-till systems on weed control and yields of continuous winter wheat.. Weed Sci. 31:813-818.
Experiments were conducted to determine whether selected herbicide treatments applied before or after hervest would provide adequate weed control without the use of tillage between crops in continuous winter wheat. After 4 yrs, pops. of winter annual cruciferae spp. at one location were lower in treatments that had poorer control of summer annual weeds of volunteer wheat. At a second location, winter annual broadleaf species were more numerous in conventionally tilled than in no-till treatments. Wheat yields obtained with no-till treatments were lower than yields obtained with conventional tillage in seasons favorable for high yields.

2006. Forcella, F.. 1986. Timing of weed control in no-tillage wheat crops.. Agron. J., 78:523-526.
A 2-yr study of the timing of wheat/weed interference was initiated in southwestern Australia. Weeds were controlled either manually or chemically at various stages of crop growth. In all cases, wheat/weed competition increased when soil temperature exceeded 10 degrees C and resulted in rapid depletions of available N.

3515. Kaprinay, I.. 1983. The occurence of weeds in winter wheat grown on soil cultivated in different ways.. Rostlina Vyroba, 29(1), p.65.
The occurence of weeds in winter wheat grown on soil cultivated in different ways. The highest occurence of weeds was found in tillage to 0.20-0.22 m, and in direct drilling. The lowest occurence was found with the use of disk harrow ploughing the soil to the depth of 0.10-0.12 m.

5327. Pollard, F., S.R. Moss, G.W. Cussans and R.J. Fround-Williams. 1981. The influence of tillage on the weed flora in a succession of winter wheat crops.. Weed Research, 22:129-136.
Six species were reduced in number by reduced cultivation or no tillage, whilst four species, including two grasses, were increased. A. myosuroides was more numerous on direct drilled and time cultivated plots than on ploughed. Herbicides gave good control on the silt loam, but failed to control the weed on the clay loam. On the clay loam, A. fatua was most numerous on tine cultivated plots and a combination of herbicides and roughing produced a decline in the population.

5539. Ramig, R.E.. 1987. Conservation tillage systems for green pea production in the Pacific Northwest.. IN: J.F. Power (ed.). The role of legumes in conservation tillage systems. p. 93-94.
Summarizes a 13 yr study of the effects of 4 tillage systems in a pea-winter wheat cropping system on water conservation and use, yields, water use efficiency, and the changes in weed populations. Water storage on land on which wheat stubble was left standing overwinter averaged 10% more than on fall-tilled stubble. There were no significant differences in wheat yields among tillage systems. Weed infestations in peas shifted due to tillage, primarily with lambsquarters. Spring plow was worst. Conservation tillage for a wheat-pea rotation can enhance water conservation, and in dry years can increase pea yields by 20% and wheat yields by 5%. Long-term effects are not consistent due to crop residue influences.

5934. Rogers, R.D.. 1982. Undercutting as a wildlife conservation method.. Proc. Great Plains Ag. Council, p.25.
Using an undercutter without mulch treaders instead of surface tillage implements for fallow weed control in spring can save up to 50% of the bird nests in wheat stubble. Wheat stubble is often undisturbed following harvest and provides a good source of winter food and cover for wildlife. Nest survival increases directly with undercutter size and can potentially exceed 50% with large, wide-bladed undercutters. Both for wildlife and agronomic benefits, the use of an undercutter for the first spring fallow weed control operation is strongly recommended.

6137. Seely, C.I.. 1952. Controlling perennial weeds with tillage.. ID Agr. Expt. Sta. Bull. #288.
Genese, ID; bindweed, Canada thistle, white top, Russian knapweed. T: weed control stragegies, weed growth.

7753. Young, Frank. 1989. Integrated pest management project update.. Paper presented at WA state weed conference, Nov. 13,1989.
This paper briefly describes the IPM weed study underway near Pullman, WA. This experiment uses field size plots for several rotation, tillage, and weed control treatments. Four years of research have been completed. Generally, the yield of spring cereals has not been affected by either weed management levels or tillage systems. Yields of spring peas were 17% greater with maximum weed management compared to the minimum level. Only three of the minimum tillage systems left sufficient residue cover to meet the 30% SCS requirement. However, all reduced tillage systems left more than 30% residue during the critical winter months. Yields of peas under conservation tillage were 13% greater than with conventional tillage, indicating the ability to reduce erosion potential with this crop and not suffer a yield penalty. No-till seeding has been successful either after spring wheat or spring peas, but not after the high residue of winter wheat.

8568. Anon.. n.d.. Spring-tine cultivator for conventional and organic farming methods.. promotional brochure, T. Hatzenbichler & Sons, Austria.
The spring-tine harrow is an implement used in Europe for mechanical weed control in field crops such as wheat. Recent preliminary field tests in Wisconsin found control to range from 40-90%. A similar implement may be available from Lindsay Bros. in Des Moines, IA. It reportedly does not perform well with much surface residue.

8608. Young, F.L.. 1990. IPM systems research.. unpublished handout from USDA-ARS Weed Research Unit, Pullman, WA 99164.
The IPM Weeds study near Pullman, WA uses two 3-yr crop rotations, two tillage systems, and three weed management (herbicide) levels. Spring pea average yields after 3 yr were higher with chisel plow than with moldboard plow, slightly responsive to increased weed management level, and highest with maximum weed management/chisel plow combination.

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