WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, July 23, 2018

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Search results on 07/23/18

1493. Cuthbertson, E.G.. 1969. Chondrilla juncea in Australia. 2. Preplanting weed control and wheat production.. Aust. J. Exp. Agric. Anim. Husb., 9:27-36.
Both lucerne and subterranean clover reduced skeletonweed populations significantly. The yield response comes from the temporary removal of the weed in the presowing period, rather than from the longer term reduction in weed cover. The response on plots with low weed density was not economic. Early suppression of the weed by any means increases grain yield. Critical density would be about 20% ground cover. My experience is that 30% groundcover generally warrants herbicide application. At lower densities, cultivation is more satisfactory.

1882. Erickson, L.C.. 1978. Skeletonweed in Australia. Tri State Skeletonweed consortium.. ID Agr. Expt. Sta. Misc. Series #46.
Describes the history of this weed in Australia and the parallels to problems with it in the PNW.

7472. Wells, G.J.. 1971. Skeleton weed in the Victoria Mallee: 3. The effects of applied phosphorus and nitrogen on wheat on infested land.. Australian J. of Exp. Agric. Anim. Husb., 11:229-35.
The lucerne stands selected in the first three years were overgrazed and not very dense. Under these conditions, lucerne offers little competition to skeletonweed. The effect of phosphorus in reducing grain protein content is probably the result of higher grain yields with the associated dilution of protein in the grain.

7480. Wells, G.J.. 1971. Skeleton weed in the Victoria Mallee: 4. Effects of fallowing on wheat yields and weed populations.. Aust. J. Exp. Agric. Anim. Husb., 11:313-319.
The standard winter fallow gave better control of skeleton weed than any other treatment. Fallowing for nine months (standard winter fallow) was more effective than most other treatments in conserving moisture and/or nitrate nitrogen. Low rainfall during the summer months prevents regular cultivation of fallows, owing to the danger of wind erosion, and results in poor control of skeleton weed.

7488. Wells, G.J.. 1970. Skeleton weed (Chondrilla juncea) on the Victorian Mallee: 2. Effect of legumes on soil fertility, subsequent wheat crop and weed population.. Aust. J. Exp. Agric. Anim. Husb., 10:622-629.
This experiment has shown that, although wheat crops grown on skeleton weed infested land will give economic responses to applied nitrogen in seasons of adequate rainfall, the financial returns are likely to be much lower than if lucerne were included in the rotation. Therefore, sowing lucerne on arable land infested with the weed is not only a practical means of weed control, but also sound management, since it improves pasture production, soil fertility, and subsequent wheat yields on some of the poorest soil types in the Mallee.

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