SELECTIVE CHEMICAL CONTROL OF COUCHGRASS AND BROMEGRASS IN KENTUCKY BLUEGRASS SOD

1964 ◽  
Vol 44 (3) ◽  
pp. 296-297
Author(s):  
Wm. G. Corns ◽  
Wm. H. Vanden Born ◽  
R. J. Schraa
Keyword(s):  
Chemical Control ◽  
Kentucky Bluegrass ◽  
Selective Chemical

not available

Chemical Control of Reed Canarygrass on Irrigation Canals

Weed Science ◽  
1968 ◽  
Vol 16 (4) ◽  
pp. 465-468 ◽  
Author(s):  
J. M. Hodgson
Keyword(s):  
Chemical Control ◽  
Trichloroacetic Acid ◽  
Poa Pratensis ◽  
Ammonium Thiocyanate ◽  
Growing Season ◽  
Kentucky Bluegrass ◽  
Early Winter ◽  
Irrigation Canals ◽  
Reed Canarygrass ◽  
Irrigation Project

From 1962 to 1967, we evaluated herbicides for control of natural infestations of reed canarygrass (Phalaris arundinacea L.) on canal banks of the Huntley, Montana irrigation project. Two,2-dichloropropionic acid (dalapon) and 3-amino-1,2,4-triazole ammonium thiocyanate (hereinafter referred to as amitrole-T) controlled reed canarygrass. These herbicides were compared with a number of others. Spring foliage treatments with a combination of amitrole-T at 2 1b/A and dalapon or trichloroacetic acid (TCA) at 5 or 10 1b/A were more effective than amitrole-T at 4 1b/A. Amitrole-T was more tolerant to fine grasses such as Kentucky bluegrass (Poa pratensis L.) or redtop (Agrostis alba L.) than dalapon and in some situations it was more desirable than dalapon. Dalapon and TCA were more effective as late fall or early winter treatments to control reed canarygrass during the following growing season. Rates of 20 or 40 1b/A controlled the grass for one season even at the water's edge where it is usually more persistent. At 5 to 10 1b/A, 2,3,5-trichloro-4-pyridinol (pyriclor) controlled reed canarygrass, and it also was effective at 2 1b/A with 2 1b/A of amitrole-T.

Effects of Weed Control and Irrigation on the Growth of Young Pecans

1990 ◽  
Vol 4 (4) ◽  
pp. 892-894 ◽  
Author(s):  
Michael G. Patterson ◽  
Glenn Wehtje ◽  
William D. Goff
Keyword(s):  
Weed Control ◽  
Tree Growth ◽  
Chemical Control ◽  
Growing Season ◽  
Control Effect ◽  
Carya Illinoensis ◽  
Maximum Increase ◽  
Tree Diameter ◽  
The Third ◽  
Selective Chemical

The effect of irrigation and weed control by various mechanical and chemical means was evaluated over a 4-yr period on newly planted pecans [Carya illinoensis(Wang.) K. Koch]. Weed control effect on tree growth became evident in the second growing season, and became more pronounced after the third and fourth season. After the fourth season, the maximum increase in tree diameter (384%) was achieved with comprehensive, herbicide-based weed control. Mowing provided a 224% increase, which was equivalent to the untreated (229%). Disking and selective chemical control of grass weeds resulted in 339 and 292% increase, respectively. Cumulative increase in tree diameter was 316 and 271% with and without irrigation, respectively.

Selective chemical control of doublegee (Emex australis) in legume pasture

1977 ◽  
Vol 17 (84) ◽  
pp. 80 ◽  
Author(s):  
DJ Gilbey
Keyword(s):  
Chemical Control ◽  
Growth Stage ◽  
Leaf Growth ◽  
Growing Season ◽  
Field Trials ◽  
Emex Australis ◽  
Selective Control ◽  
Selective Chemical ◽  
One Year ◽  
Clover Seed

Seven chemicals were evaluated for selective control of doublegee (Emex australis) in legume pasture in 14 field trials conducted at several sites in Western Australia over three years. The effect of removing doublegee on pasture growth was studied in four field trials over the same period. Three hundred and fifty to 700 g a.i. methabenzthiazuron ha-1 gave good selective control of this weed except at Chapman and Wongan Hills in 1974 where the beginning of the growing season was poorly defined. The selectivity of bromoxynil and WL 6361 1 in one year of trials was similar to methabenzthiazuron but that of asulam and metoxuron was too restricted for practical use when doublegees were sprayed at the 2-4 leaf growth stage, 2,4-DB showed selectivity on doublegees with 12 leaves, and no herbicides were satisfactory on doublegees with more than 12 leaves at the time of spraying. Pasture growth and clover seed production was not substantially increased by controlling doublegee.

Chemical Control of Red Sorrel in Kentucky Bluegrass Seed Fields

Weeds ◽  
1967 ◽  
Vol 15 (4) ◽  
pp. 351 ◽  
Author(s):  
C. L. Canode ◽  
W. C. Robocker
Keyword(s):  
Chemical Control ◽  
Kentucky Bluegrass

scholarly journals Selective chemical control of yellow bristle grass (Setaria pumila) in pasture

2009 ◽  
Vol 62 ◽  
pp. 217-221
Author(s):  
T.K. James ◽  
A. Rahman
Keyword(s):  
Chemical Control ◽  
Growth Stage ◽  
Animal Health ◽  
Extended Period ◽  
Field Trials ◽  
Annual Grass ◽  
Severe Damage ◽  
Herbicide Application ◽  
Poor Control ◽  
Selective Chemical

Yellow bristle grass (Setaria pumila) is a summergrowing annual grass currently expanding in distribution throughout pastures in Waikato Readily grazed in its early vegetative growth stage it is avoided by animals when the seed heads appear as barbed bristles lead to animal health problems particularly around the mouth Three field trials were conducted with several herbicides for control of yellow bristle grass Since yellow bristle grass germinates over an extended period from November to February the best control that could be achieved from a single herbicide application was 70 by 22DPA alone or in combination with either TCA or carbetamide applied in December MSMA was more effective on larger plants Ethofumesate treatment resulted in poor control of yellow bristle grass and severe damage to white clover (Trifolium repens) All herbicides evaluated resulted in variable levels of damage to perennial ryegrass (Lolium perenne)

Selective chemical control of capeweed in wheat and oats

1972 ◽  
Vol 12 (54) ◽  
pp. 60 ◽  
Author(s):  
TG Reeves ◽  
JM Lumb
Keyword(s):  
Grain Yield ◽  
Chemical Control ◽  
Early Growth ◽  
Crop Damage ◽  
Growth Stages ◽  
North Eastern ◽  
Selective Chemical

In eight experiments conducted in north-eastern Victoria from 1965-1970, a range of herbicides were tested for selective post-emergence control of capeweed (Arctotheca calendula) in wheat and oats. Linuron, diquat, and bromoxynil were the best treatments tested and generally reduced capeweed density when applied in the early growth stages, causing little or no crop damage. Significant grain yield increases from spraying were obtained in each experiment with wheat, but in oats only one significant increase was obtained. Post-tillering treatments with 2,4-D and picloram plus 2,4-D did not increase grain yield.

The selective chemical control of Wimmera ryegrass in wheat with di-allate and tri-allate

1972 ◽  
Vol 12 (54) ◽  
pp. 55 ◽  
Author(s):  
TG Reeves ◽  
CL Tuohey
Keyword(s):  
Chemical Control ◽  
Crop Damage ◽  
Lolium Rigidum ◽  
Grain Yields ◽  
Economic Basis ◽  
Wimmera Ryegrass ◽  
Selective Chemical

Two herbicides, di-allate and tri-allate, were compared for the pre-emergence control of Wimmera ryegrass (Lolium rigidum) in wheat at three different locations in the Victorian wheatgrowing areas. Both herbicides significantly reduced ryegrass populations in the crop, but di-allate was consistently more effective than tri-allate. Grain yields were generally enhanced by spraying, but 1.12 kg a.i. per hectare of either material sometimes caused crop damage when applied before sowing. On an economic basis, di-allate at 0.56 kg a.i. per hectare was superior to all other treatments whether applied just before or just after sowing.

Selective chemical control of annual ryegrass (Lolium rigidum) in oilseed rape, field peas and lupins

1974 ◽  
Vol 14 (71) ◽  
pp. 771 ◽  
Author(s):  
TG Reeves ◽  
JM Lumb
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Chemical Control ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Grain Yields ◽  
Pisum Arvense ◽  
Field Peas ◽  
North Eastern ◽  
Selective Chemical

The effectiveness of herbicides for selective control of annual ryegrass (Lolium rigidum) in oilseed rape (Brassica napus), field peas (Pisum arvense) and narrow-leafed lupins (Lupinus angustifolius) was investigated in nine experiments in north-eastern and southern Victoria. Of the herbicides tested, di-allate, trifluralin and simazine significantly reduced ryegrass populations in all experiments where they were used. Pre-planting incorporated treatments were generally more effective than post-sowing or post-emergence treatments in oilseed rape and field peas. Control of ryegrass generally resulted in higher grain yields in all three crops, although lupins showed the greatest response. Dalapon, applied to oilseed rape after emergence, caused flower distortion and reduced yields in some experiments.

Selective chemical control of Amsinckia species in wheat

1968 ◽  
Vol 8 (30) ◽  
pp. 94 ◽  
Author(s):  
JM Lumb
Keyword(s):  
Chemical Control ◽  
Early Stage ◽  
Dry Weight ◽  
Crop Growth ◽  
Wheat Growth ◽  
Selective Chemical ◽  
Western Victoria ◽  
Two Stages ◽  
North Western

The results of nine experiments in north-western Victoria investigating the chemical control of Amsinckia spp. growing in wheat are reported. The chemicals prometryne, linuron, bromoxynil, diuron, dicamba, and picloram were applied to seedling Amsinckia at an early stage of wheat growth. For comparison, treatments with 2,4-D applied at two stages of crop growth were included. Prometryne, linuron, and bromoxynil controlled Amsinckia in all trials, and wheat yields were increased. The early 2,4-D sprays controlled Amsinckia but reduced wheat yields. Later 2,4-D sprays, applied when wheat was fully tillered, caused some reduction in the density and dry weight of Amsinckia, but wheat yields were not increased.

Chemical Control of Kentucky Bluegrass

1953 ◽  
Vol 45 (3) ◽  
pp. 121-122
Author(s):  
R. E. Frans ◽  
M. A. Sprague
Keyword(s):  
Chemical Control ◽  
Kentucky Bluegrass
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