CHEMICAL WEED CONTROL IN TRANSPLANTED TOMATOES

1962 ◽  
Vol 42 (1) ◽  
pp. 190-197 ◽  
Author(s):  
W. J. Saidak
Keyword(s):  
Weed Control ◽  
Chemical Control ◽  
Harvest Time ◽  
Weed Population ◽  
Control Effectiveness ◽  
Effect On Yield

Experiments on the chemical control of weeds in tomatoes were conducted in 1959 and 1960 at Ottawa and Smithfield, Ontario. The weed populations were dominated by annual broadleaved weeds.Granular formulations of amiben, CDEC, DNBP, EPTC, simazine, CIPC and neburon were applied in 1959 as pre-emergence herbicides to established transplanted tomatoes. Solan was applied as a post-emergence spray about 1 month after transplanting when the weeds were less than 4 inches high. Amiben, solan and CDEC were selected for further evaluation in 1960 on the basis of weed control effectiveness and lack of crop injury.The effect on yield, of single and double applications of amiben, solan and CDEC, was not statistically significant. Two applications of amiben and CDEC provided significantly better weed control than single applications at Smithfield, but little difference was found at Ottawa where the weed population was smaller.In these experiments solan, amiben and CDEC at 4 and 6 pounds per acre have produced reliable and effective weed control from shortly after transplanting until harvest time. Neither solan, amiben nor CDEC caused injury to the tomatoes.

Weed Control Economics in Bell Pepper (Capsicum annuum) with Napropamide and Hand Weeding

1994 ◽  
Vol 8 (3) ◽  
pp. 530-535 ◽  
Author(s):  
W. Thomas Lanini ◽  
Michelle Le Strange
Keyword(s):  
Capsicum Annuum ◽  
Weed Control ◽  
Field Studies ◽  
Bell Pepper ◽  
Harvest Time ◽  
Net Returns ◽  
Weed Cover ◽  
Effect On Yield ◽  
Hand Weeding ◽  
Time Required

Field studies were conducted in 1990 and 1991 at Davis and Five Points, CA to evaluate weed control with napropamide and hand-weeding and the effect on yield and profitability in transplanted bell pepper. Weed cover 8 wk after transplanting averaged less than 10% in plots hand-weeded biweekly for 6 wk after transplanting. Weed cover at harvest was less than 30% in plots hand-weeded at 8 wk after transplanting. Napropamide treatment reduced weed cover at 8 wk after transplanting an average of 34% compared to untreated plots, but differences declined to 14% at harvest. Time required to hand-weed plots was greater if the interval between weeding was 4 instead of 2 wk. The time needed to hand-weed plots was reduced from 38% to 71% by napropamide treatment. When weeds were excluded by hand-weeding for the entire season, bell pepper yielded 25 810 kg/ha and was 4% to 18% higher than other treatments. Net returns were greater for plots that were hand-weeded the entire season or when napropamide was combined with hand-weeding at 4 and 8 wk after transplanting, compared to other treatments.

scholarly journals Application of oxyfluorfen and pendimethalin to control weeds on soybean plantation

2022 ◽  
Vol 951 (1) ◽  
pp. 012066
Author(s):  
H Hasanuddin ◽  
G Erida ◽  
S Hafsah ◽  
A Marliah ◽  
Y Agustiawan ◽  
...  
Keyword(s):  
Weed Control ◽  
Crop Yield ◽  
Weed Management ◽  
Chemical Control ◽  
Block Design ◽  
Dry Weight ◽  
Significant Loss ◽  
Weed Species ◽  
Weed Population ◽  
Different Types

Abstract The appearance of weeds on crops has led to the significant loss of crop yield. Therefore, chemical control with herbicides has been an important tool for rapid and efficient weed management in crops. The objective of this study was to evaluate the effect of herbicides oxyfluorfen and pendimethalin against weeds on soybean plantation. This research employed Randomized Completely Block Design (RCBD) Factorial with 2 factors. The first factor was the type of herbicides: oxyfluorfen and pendimethalin. The second factor was herbicide doses: 0, 500, 1000, 1500 and 2000 g a.i ha-1, applied on soybean at 1 day after planting (DAP). The percentage of weed control, percentage of weed coverage, weed species, weed population, and weed dry weight were observed at 3, 5, 7 and 9 weeks after planting (WAP). The results revealed that different types and doses of herbicide applied has affected the percentage of weed control, percentage of weed coverage weed species and weed dry weight.

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.

Weed Population and Crop Yield Response to Recommendations from a Weed Control Decision Aid

1999 ◽  
Vol 91 (3) ◽  
pp. 386-392 ◽  
Author(s):  
Melinda L. Hoffman ◽  
Douglas D. Buhler ◽  
Micheal D. K. Owen
Keyword(s):  
Weed Control ◽  
Crop Yield ◽  
Decision Aid ◽  
Yield Response ◽  
Weed Population ◽  
Control Decision

scholarly journals Weed control in soybean (Glycine max L.) through resource management strategies and its influence on yield and nutrient uptake

2017 ◽  
Vol 9 (1) ◽  
pp. 539-543
Author(s):  
Aradhana Bali ◽  
B. R. Bazaya ◽  
Sandeep Rawal
Keyword(s):  
Resource Management ◽  
Nutrient Uptake ◽  
Weed Control ◽  
Weed Management ◽  
Management Strategies ◽  
Climatic Conditions ◽  
Glycine Max L ◽  
Effect On Yield ◽  
Hand Weeding ◽  
Quizalofop Ethyl

A field experiment was conducted during kharif season of 2011 at Research Farm, Sher-e-Kashmir University of Agricultural Sciences and Technology, Chatha, Jammu to evaluate the effect of weed management prac-tices on yield and nutrient uptake of soybean utilizing different resource management strategies. The lowest weed density and dry matter of weeds was recorded with hand weeding at 15 and 35 days after sowing (DAS) which was equally effective as imazethapyr @ 75 g ha -1 (PoE) fb hoeing at 35 DAS and quizalofop-ethyl @ 40 g ha-1 (PoE) fb hoeing at 35 DAS. All weed control treatments had significant effect on yield and nutrient up-take of soybean. Among the different weed control treatments, lowest N, P and K uptake by weeds were recorded in hand-weeding (15 and 35 DAS) which was statistically at par with imazethapyr @ 75 g ha -1 fb hoeing at 35 DAS. The maximum uptake by seed and straw were recorded in weed free which was statistically at par with twice hand weeding at 15 and 35 DAS, imazethapyr @ 75 g ha-1 fb hoeing at 35 DAS and quizalofop-ethyl @ 40 g ha-1 fb hoeing at 35 DAS. The highest seed and straw yield of soybean was harvested with hand-weeding (15 and 35 DAS) followed by imazethapyr @ 75 g ha -1 fb hoeing at 35 DAS. For the first time, soybean crop has been introduced in Jammu region for research purpose. Weed management varies with agro-climatic conditions. The study would be helpful to understand weed menace in this particular climatic condition of Jammu and to manage them combinedly and efficiently.

scholarly journals Evaluation of Herbicide Programs in Florida Cabbage Production

HortScience ◽  
2018 ◽  
Vol 53 (5) ◽  
pp. 646-650 ◽  
Author(s):  
Jialin Yu ◽  
Nathan S. Boyd ◽  
Peter J. Dittmar
Keyword(s):  
Adverse Effect ◽  
Brassica Oleracea ◽  
Weed Control ◽  
Significant Problem ◽  
Plastic Mulch ◽  
Herbicide Treatments ◽  
Effect On Yield ◽  
Herbicide Programs

In Florida, cabbage (Brassica oleracea L.) is typically grown without a plastic mulch and as a result, weeds are a significant problem in most fields. Experiments were conducted from Nov. 2015 to Apr. 2016 in Balm, Citra, and Parrish, FL, to evaluate weed control and ‘Bravo’ cabbage tolerance to multiple herbicide programs applied pretransplanting (PRE-T), posttransplanting (POST-T), PRE-T followed by (fb) a sequential application at 3 weeks after transplanting (WATP), and POST-T fb sequential application at 3 WATP. PRE-T herbicide treatments of 277 g a.i./ha clomazone, 280 g a.i./ha oxyfluorfen, and 798 g a.i./ha pendimethalin and POST-T herbicide treatments of 6715 g a.i./ha dimethyl tetrachloroterephthalate (DCPA) were ineffective, and weed control never exceeded 70% in Balm and provided <50% weed control in Citra and Parrish at 6 and 8 WATP, respectively. POST-T applications of napropamide + S-metolachlor at 2242 + 1770 g a.i./ha, DCPA + S-metolachlor at 6715 + 1170 g a.i./ha, and S-metolachlor POST-T fb clopyralid at 1170 g a.i./ha fb 210 g ae/ha were the most effective herbicide treatments and consistently provided >70% weed control. In addition, results showed that all of the herbicide treatments evaluated except the PRE application of clomazone at 277 g a.i./ha are safe for cabbage with no adverse effect on yield.

Early Chemical Control of Weeds in Europe

Weed Science ◽  
1976 ◽  
Vol 24 (6) ◽  
pp. 594-597 ◽  
Author(s):  
Allan E. Smith ◽  
D. M. Secoy
Keyword(s):  
Weed Control ◽  
Chemical Control ◽  
Ancient Greek ◽  
History Of

A brief history of chemical weed control in Europe from ancient Greek and Roman times to 1850 is given. The use of the various chemicals recorded is discussed and their possible efficacy commented upon.

Influence of AC 263,222 Rate and Application Method on Weed Management in Peanut (Arachis hypogaea)

1997 ◽  
Vol 11 (3) ◽  
pp. 520-526 ◽  
Author(s):  
Theodore M. Webster ◽  
John W. Wilcut ◽  
Harold D. Coble
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Application Rate ◽  
Purple Nutsedge ◽  
Yellow Nutsedge ◽  
Control Effectiveness ◽  
Application Method ◽  
Rate Controlled ◽  
Ac 263,222 ◽  
Prickly Sida

Experiments were conducted in 1991 and 1992 to evaluate the weed control effectiveness from several rates of AC 263,222 applied PPI and PRE (36 and 72 g ai/ha), early POST (EPOST) (18, 36, 54, or 72 g/ha), POST (18, 36, 54, or 72 g/ha), and EPOST followed by (fb) POST (27 fb 27 g/ha or 36 fb 36 g/ha). These treatments were compared to the commercial standard of bentazon at 0.28 kg ai/ha plus paraquat at 0.14 kg ai/ha EPOST fb bentazon at 0.56 kg/ha plus paraquat at 0.14 kg/ha plus 2,4-DB at 0.28 kg ae/ha. Application method had little effect on weed control with AC 263,222. In contrast, application rate affected control. Purple nutsedge, yellow nutsedge, prickly sida, smallflower morningglory, bristly starbur, common cocklebur, and coffee senna were controlled at least 82% with AC 263,222 at 36 g/ha (one-half the maximum registered use rate) regardless of application method. AC 263,222 at 72 g/ha (registered use rate) controlled sicklepod 84 to 93%, Florida beggarweed 65 to 100%, andIpomoeamorningglory species 89 to 99%. A single application of AC 263,222 at 36 g/ha or more controlled all weeds (with the exception of Florida beggarweed) as well or greater than sequential applications of bentazon plus paraquat fb bentazon, paraquat, and 2,4-DB. All rates of AC 263,222 applied POST and all application methods of AC 263,222 at 72 g/ha had better yields than the pendimethalin control.

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.

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