3 edition of Weed control in established alfalfa found in the catalog.
Weed control in established alfalfa
D. F. Mayer
1988 by Cooperative Extension, College of Agriculture & Home Economics, Washington State University in Pullman, [Wash.] .
Written in English
|Series||Extension bulletin -- 0941., Extension bulletin (Washington State University. Cooperative Extension) -- 941.|
|Contributions||Washington State University. Cooperative Extension.|
|The Physical Object|
|Pagination||5,  p. ;|
Scouting during fall and winter for weeds and insects is critical in newly planted fields. Plants that accumulate nitrates during stress will convert nitrates into safe compounds after the stress period is over. Always soil test before planting. Seedling alfalfa must be scouted about one month after emergence to determine the weed infestation.
This should provide adequate information for decisions on dormant or between-cuttings herbicide applications. If not, you can base your herbicide selection between the two on price and availability. Be especially cautious with new fall seedings. In the Central Valley, dodder germinates from mid-February through June, so preemergence herbicides need to be applied, and water incorporated, prior to dodder emergence. Raptor has a similar spectrum of winter annual weed control as Pursuit. Keep in mind that RR varieties are not labeled for use in wildlife food plots because it is not intensively managed, which will increase the chances of seed production and dispersion.
The company disclaims any current intention or obligation to update any forward-looking statements or any of the factors that may affect actual results. Like the other herbicides discussed in this article, it is systemic, so weeds need to be actively growing when they are sprayed. These herbicides work well on seedling grasses that are less than 4 inches tall, and alfalfa tolerates both herbicides very well. Persistence depends on management.
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Fields infested with field bindweed should be planted in fall when the field bindweed is dormant or growing very slowly.
Pursuit is effective on many winter annual broadleaves including small chickweed. Follow RRXtend Certain statements contained in this presentation are "forward-looking statements," such as statements concerning the company's anticipated financial results, current and future product performance, Weed control in established alfalfa book approvals, business and financial plans and other non-historical facts.
The use of herbicides in rotational crops such as barley, cotton, corn, and in fallow fields can also be helpful in reducing populations of yellow nutsedge.
Research trials conducted in the Central Valley have demonstrated that 1 to 2 applications of glyphosate early and midseason during the growing season adequately controlled and reduced the long-term population of nutsedge.
Some other herbicides approved for use in alfalfa like Pursuit imazethapyrSelect 2EC clethodim or Buctril bromoxynil may be tank-mixed with glyphosate. If spraying during extended cold periods, expect weeds to respond slower or the herbicide can have reduced activity.
Ryegrass can also be controlled with spring applications. In addition, stand life of spring-established fields is usually shorter. Do not use 2,4-DB if the mix contains brassicas, chicory or other broadleaf forbs, as they will likely be damaged or killed. Johnsongrass is very susceptible to sethoxydim or clethodim applied when the grass is shorter than 12 to 18 inches.
Poast Plus should be applied to small grasses and performance improves with warmer temperatures. Later applications of 2 pounds active ingredient per acre are necessary after the third and fourth cuttings. In food plot plantings, sethoxydim is commonly used to control grasses in legume and brassica plantings.
Most of these summer grasses can be a problem in new spring stands and thinning stands. Bruce Anderson. Alfalfa usually needs about six weeks growth after germination to store the necessary carbohydrates and survive the winter. However, short-term partial budgets can be used to estimate and provide some guidance on controlling weeds.
It is often purchased under the trade names Arrest Max, Arrow or Select. Dodder is generally not completely controlled by crop rotation because its seed is long-lasting; however, it does help reduce dodder numbers.
However, since these statements are based on factors that involve risks and uncertainties, the company's actual performance and Weed control in established alfalfa book may differ materially from Weed control in established alfalfa book described or implied by such forward-looking statements.
Growers should evaluate data from multiple locations and years whenever possible and should consider the impacts of these conditions on the grower's fields. Adjust mowing Weed control in established alfalfa book so several leaves remain on alfalfa seedlings after clipping to help your alfalfa seedlings regrow rapidly.
Prowl H2O will control many annual grasses and broadleaves including crabgrass, panicums, foxtails, lambsquarters, pigweed at the 1 to 4 pt rate. Plant seeds one quarter inch to one half inch deep in medium to heavy soils and one half inch to one inch deep on sandy soils.
Flail mowing effectively controls attached dodder. Check with your seed brand representative for the registration status in your state.
Applications can be made in the fall after the last cutting, during winter dormancy, in the spring, or between cuttings. These weeds will significantly reduce alfalfa yields and could result in shortened stand life. This results in significant reductions in alfalfa production at first harvest and is one of the causes of poor stands.
Testing the manure prior to application is recommended for application rates that will satisfy alfalfa nutrient needs. Understanding these terms will go a long way in helping you select the right herbicide for your specific application.
Other weeds such as annual bluegrass, common chickweed, dodder, henbit, prostrate knotweed, smartweed, and velvetleaf can be controlled with the 2 to 4 qt rate. Apply 0. Then alfalfa should regrow rapidly so grasses don't get much time to become a problem.Weed Management in Alfalfa: Alfalfa is stressed by weed interference during establishment and in thinning stands.
Alfalfa does not occupy all of the ground area at these two stages, so weeds are able to establish and compete with alfalfa for soil nutrients, water, light, and space. Weed Control Principles Importance of Weed Control Weed control is an essential part of all crop produc-tion systems.
Weeds reduce yields by competing with crops for water, nutrients, and sunlight, and may directly reduce profits by hindering harvest operations, lowering crop.
Weed Control in Established Alfalfa (Medicago sativa L.) with Postemergence Herbicides 1 MARÍA C. ARREGUI 2, DANIEL SÁNCHEZ, and ROBERTO SCOTTA Abstract: Field .Established alfalfa is highly competitive, however, pdf Increased marketability of the hay is usually the major benefit of weed control in alfalfa.
Even if weeds in alfalfa do not affect marketability of the hay, there are some reasons to control the weeds anyway. Weedy alfalfa can .Established alfalfa is highly competitive, however, and Increased marketability of the hay is usually the major benefit of weed control in alfalfa.
Even if weeds in alfalfa do not affect marketability of the hay, there are some reasons to control the weeds anyway. Weedy alfalfa can .Managing weeds in ebook alfalfa.
By Jeff Stachler-May 4, 0. Share on Facebook. Greater than 95 percent of weed control in alfalfa is due to a healthy stand from competition.