CHEMICAL CONTROL OF INSECTS ATTACKING ALFALFA IN SOUTHWESTERN ONTARIO

1958 ◽  
Vol 38 (1) ◽  
pp. 34-38 ◽  
Author(s):  
K. G. Davey ◽  
G. F. Manson
Keyword(s):  
Chemical Control ◽  
Early Spring ◽  
Adequate Control

Surveys in southwestern Ontario in 1953 and 1954 showed that the initial small numbers of sucking insects found in alfalfa fields in early spring tended to increase rapidly as the season progressed. Each time the hay was cut the number of insects was reduced but the invading population soon built up, often to economic proportions. A spray of malathion, perthane, toxaphene, or heptachlor, applied in the spring of 1954, prevented the usual build-up of spittlebug nymphs. Each of the insecticides tested, except heptachlor, increased the yield of the first cutting of hay. An application after each of the first and second cuttings did not give adequate control of sucking insects present and did not increase either cutting of hay.

CHEMICAL CONTROL OF LIOCORIS SPP., ADELPHOCORIS SPP. AND PLAGIOGNATHUS MEDICAGUS ARRAND (HEMIPTERA: MIRIDAE) IN NORTHERN ALFALFA SEED FIELDS

1961 ◽  
Vol 41 (1) ◽  
pp. 166-169 ◽  
Author(s):  
C. H. Craig
Keyword(s):  
Chemical Control ◽  
Adequate Control ◽  
Residual Toxicity ◽  
Alfalfa Seed ◽  
Agricultural Areas

One application of 1.25 pounds DDT, 0.50 pound dieldrin, or 1.0 pound heptachlor per acre when the alfalfa had just started to bud practically eliminated Adelphocoris spp. and Plagiognathus medicagus before they caused noticeable damage, and kept Liocoris spp. infestations below 0.3 per sweep throughout the season in replicated plot tests in 1956 and 1957. The residual toxicity provided by these treatments should ensure adequate control of plant bugs in alfalfa grown for seed in the northern agricultural areas of Western Canada.One application of 0.75 pound DDT or 0.5 pound heptachlor effectively controlled Adelphocoris spp. and P. medicagus, but permitted Liocoris spp. infestations to reach about 2.0 bugs per sweep after 6 or 7 weeks. The residual toxicity provided by these treatments would not be adequate to prevent damaging infestations of Liocoris spp. from developing in some years.

scholarly journals CHEMICAL CONTROL OF HELMINTHOSPORIUM LEAF SPOT OF PERENNIAL RYEGRASS

2021 ◽  
Author(s):  
Sergey Kostenko ◽  
Natalia Kostenko ◽  
Natal'ya Razgulyaeva ◽  
Nikolay Puca
Keyword(s):  
Perennial Ryegrass ◽  
Leaf Spot ◽  
Chemical Control ◽  
Early Spring

The results of experiments to determine the effectiveness of the Bravo fungicide in the fight against Helminthosporium leaf spot are presented. It was found that early spring spraying of perennial ryegrass with Bravo at a dose of 1.5 l/ ha reduced the development of the disease by 5 times compared to the control.

Chemical control of crown rot in Queensland bananas

1991 ◽  
Vol 31 (5) ◽  
pp. 693 ◽  
Author(s):  
DR Jones
Keyword(s):  
Chemical Control ◽  
Good Control ◽  
Crown Rot ◽  
Postharvest Disease ◽  
Adequate Control ◽  
Fusarium Pallidoroseum ◽  
Banana Plantations

The efficacy of benomyl, prochloraz, flusilazole and other fungicides in controlling crown rot, a postharvest disease of bananas, was studied. In experiments with harvested fruit, prochloraz and flusilazole were the most effective fungicides. Benomyl was less effective than prochloraz. In 1 experiment, Fusarium pallidoroseum and a Verticillium sp. were frequently isolated from diseased crowns of untreated fruit. Both fungi were pathogenic and sensitive to prochloraz in vitro, but only F. pallidoroseum was sensitive to benomyl. The Verticillium sp. was consistently isolated from diseased crowns of benomyl-treated fruit. The failure of benomyl to control crown rot adequately in Queensland may be related to the presence of benomyl-tolerant crown rot fungi in the flora of banana plantations. In 2 experiments, prochloraz gave good control of crown rot in fruit stored for extended periods before ripening; however, it failed to give adequate control in a third.

scholarly journals CHEMICAL CONTROL OF PEACHES FROM CLASTEROSPORIOSIS IN THE CONDITIONS OF THE REPUBLIC OF UZBEKISTAN

2021 ◽  
pp. 201-206
Author(s):  
Boyjigitov Fozil Mukhammadievich
Keyword(s):  
Incidence Rate ◽  
Chemical Control ◽  
Chemical Method ◽  
Early Spring ◽  
Chemical Protection ◽  
The Republic ◽  
Severity Of The Disease ◽  
Triple Treatment ◽  
Fungus Disease

Peach varieties Istikbol and Gulnoz were found to be resistant to clasterosporiosis. The incidence rate ranged from 13.0 to 45.0%, with the severity of the disease from 8.0 to 22.7%. In the fight against clasterosporiosis, the chemical method is considered the most effective. For chemical protection, it is recommended early spring triple treatment of trees in the following terms: 1 - before the buds swell; 2 - after blooming of trees; 3 - two weeks after blooming, with one of the following fungicides: Skor 250 EC (normally 0.02% suspension), Kresoxin 50% WDG. (0.02%), Topsin-M 70% WP (0.1%) and Falcon 46% EC (0.05%) against peach clasterosporiosis. KEYWORDS: peach, fungus, disease, clasterosporiosis, fungicide, efficiency, productivity

CHEMICAL CONTROL OF THE EUROPEAN WIREWORM AGRIOTES OBSCURUS (L.) IN THE LOWER FRASER VALLEY OF BRITISH COLUMBIA

1957 ◽  
Vol 37 (4) ◽  
pp. 413-417 ◽  
Author(s):  
A. T. S. Wilkinson
Keyword(s):  
British Columbia ◽  
Chemical Control ◽  
Ethylene Dibromide ◽  
Agriotes Obscurus ◽  
The Third ◽  
Adequate Control ◽  
Good Protection ◽  
Cent Mortality ◽  
Silty Loam ◽  
Fraser Valley

The wireworm Agriotes obscurus (L.) was controlled in silty loam at Agassiz, British Columbia, from 1953 to 1956, by insecticides incorporated into the soil. Single applications of aldrin or heptachlor at 5 lb. of toxicant per acre gave good protection to potatoes planted a month after application, and gave 100 per cent mortality of wireworms by the second or third season. Aldrin at 2.5 lb., DDT at 15 lb., and granulated heptachlor at 3 lb. did not give adequate control in the year of application but gave appreciable control in the third and fourth seasons. Ethylene dibromide at 1.6 gal. per acre did not give control.

Weed Potential of the Forage Legume Aeschynomene (Aeschynomene americana) in Rice (Oryza sativa) and Soybeans (Glycine max)

1990 ◽  
Vol 4 (2) ◽  
pp. 284-290
Author(s):  
Ann M. Thro ◽  
Alan T. Wier ◽  
F. Gilbert Barker
Keyword(s):  
Oryza Sativa ◽  
Glycine Max ◽  
Chemical Control ◽  
Field Studies ◽  
Seedling Stage ◽  
Control Measures ◽  
Forage Legume ◽  
Flood Water ◽  
Adequate Control ◽  
Growth Room

Growth room and field studies were conducted to determine if increasing use of forage aeschynomene may lead to new weed problems in rice and soybeans and to identify possible control measures in these crops. In a growth room study, flooding of ‘Florida Common’ and ‘LSU 1147’ forage aeschynomene did not reduce yield. However, forage aeschynomene seedlings did not emerge from a flooded seedbed, and 1-week-old seedlings were killed by 2.5 or 7.5 cm of flooding. Competition from interseeded forage aeschynomene reduced ‘Centennial’ soybean yields by 81%. Acifluorfen, fomesafen, and lactofen, labeled for soybeans, control forage aeschynomene. Acifluorfen, labeled for rice, may control forage aeschynomene in that crop. Forage aeschynomene might become a weed problem in rice if plants are past the seedling stage when flood water is applied and could cause weed problems in soybeans; but, in most situations, cultural and chemical control practices should provide adequate control.

scholarly journals Chemical control of field horsetail (Equisetum arvense)

2010 ◽  
Vol 63 ◽  
pp. 102-107 ◽  
Author(s):  
T.K. James ◽  
A. Rahman
Keyword(s):  
Root System ◽  
Chemical Control ◽  
Field Trial ◽  
Initial Treatment ◽  
Sandy Soils ◽  
Equisetum Arvense ◽  
Flood Plains ◽  
Adequate Control ◽  
Herbicide Treatments

Field horsetail is a perennial rhizomatous weed with summergrowing fernlike foliage and sporelating stems It likes moist freedraining sandy soils and gravel riverbeds and flood plains Glasshouse experiments on 10month old potted field horsetail plants showed excellent efficacy of imazapyr amitrole metsulfuron picloram and combinations of picloram with metsulfuron or triclopyr all at highest recommended rates However in the field trial single applications of these herbicides did not provide effective longterm control with significant regrowth 2 months after treatment This suggests that most of the herbicide treatments did not damage the extensive root system sufficiently to stop considerable regrowth with herbicides such as triclopyrpicloram glyphosate and metsulfuron failing to give adequate control of this weed in the field Further applications of amitrole or triclopyrmetsulfuron 2 months after the initial treatment gave better results but also killed all other vegetation

Iron and chemical control of breathing

Pneumologie ◽  
2010 ◽  
Vol 64 (01) ◽  
Author(s):  
J Antosiewicz ◽  
M Walski ◽  
M Pokorski
Keyword(s):  
Chemical Control ◽  
Control Of Breathing

Weed Management in Small Grains Harvested for Grain

EDIS ◽  
2020 ◽  
Vol 2020 (3) ◽  
Author(s):  
Jason Ferrell ◽  
Gregory MacDonald ◽  
Pratap Devkota
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Chemical Control ◽  
Management Practices ◽  
Good Management ◽  
Small Grains ◽  
Crop Competition

Successful weed control in small grains involves using good management practices in all phases of production. In Florida, winter weeds compete with small grains for moisture, nutrients, and light, with the greatest amount of competition occurring during the first six to eight weeks after planting. Weeds also cause harvest problems the following spring when the small grain is mature. This 4-page publication discusses crop competition, knowing your weeds, and chemical control. Written by J. A. Ferrell, G. E. MacDonald, and P. Devkota, and published by the UF/IFAS Agronomy Department, revised May 2020.

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