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Makhan S. Bhullar, Simerjeet Kaur, Tarundeep Kaur and Amit J. Jhala

Potato (Solanum tuberosum) is one of four major food crops in the world. Weed control is a major component in potato production and has been accomplished using different methods, including but not limited to the use of herbicides and straw mulch. A combination of preemergence herbicide and straw mulch may improve weed control; however, no information is available for combining both methods, along with their effects on weed control, weed density, and potato tuber yields. The objective of this study was to evaluate weed control in potato using atrazine or straw mulch applied alone at different rates or in combination. A field experiment was conducted for 4 years from 2006 to 2010 in Ludhiana, Punjab, India. Common weeds included burclover (Medicago arabica), common lambsquarters (Chenopodium album), littleseed canarygrass (Phalaris minor), purple nutsedge (Cyperus rotundus), scarlet pimpernel (Anagallis arvensis), swinecress (Coronopus didymus), and toothed dock (Rumex dentatus). Results suggested that atrazine applied alone was not very effective and resulted in 0% to 78% control depending on the weed species being investigated at 30 days after treatment (DAT). Straw mulch applied alone at any rate provided ≥90% control of toothed dock, but control of other weed species was variable. A combination of atrazine and straw mulch at any rate usually resulted in >90% weed control at 30 DAT, except for swinecress and purple nutsedge. This treatment combination also resulted in weed density as low as 0 plant/m2 for common lambsquarters, scarlet pimpernel, and toothed dock. Potato tuber weight and yield was significantly higher in all treatments compared with untreated control without difference among them. It is concluded that a combination of straw mulch and atrazine can provide effective weed control in potato.

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Jose G. Franco, Stephen R. King, Joseph G. Masabni and Astrid Volder

. In this article, we evaluate the ability of watermelon to reduce weed biomass and explore the relationships between weed suppression, yields, aboveground plant biomass, and LAI. The primary objective of this study was to test the ability of watermelon

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Caitlin E. Splawski, Emilie E. Regnier, S. Kent Harrison, Mark A. Bennett and James D. Metzger

each plot on 28 July 2011 and on 10 July 2012. Weeds were counted by species, harvested at the soil surface, dried at 55 °C, and weighed. Weed counts and weed biomass at the end of the season were taken similarly, only at the north end of each plot on 2

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John Wilhoit and Timothy Coolong

ft apart lain between the edges of the plastic and weighing the mulch in the field. The distance between the edges of the plastic was measured at each location and used to calculate the area that the mulch was sampled from. Weed biomass was determined

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Charlene M. Grahn, Chris Benedict, Tom Thornton and Carol Miles

(CMFC) and Washington State University Northwestern Washington Research and Extension Center (NWREC) in Spring 2013 and 2014, and Fall 2012 and 2013. Weed biomass. Fresh weed biomass was higher in spring than in fall (1.47 and 0.27 t·ha −1 , respectively

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Nihat Tursun, Bekir Bükün, Sinan Can Karacan, Mathieu Ngouajio and Hüsrev Mennan

and was 2.5 m long. The two outer rows of each plot were used as buffer rows and 10 middle rows were used for weed biomass and yield assessments. Weed and crop measurement. Experiments were conducted on different sites within the location

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Alyssa H. Cho, Carlene A. Chase, Danielle D. Treadwell, Rosalie L. Koenig, John Bradley Morris and Jose Pablo Morales-Payan

dicotyledon species. Weed biomass was then dried at 49 °C for at least 1 week and dry weights were recorded. At 4 months after planting (MAP), the number of primary branches longer than 1 m was counted. Three plants were randomly selected from the center row

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Timothy Coolong

the completion of the study, all aboveground growth from weeds located in a 6.5-ft section in the center of each plot, measuring the entire width of a plot (≈2 ft), was harvested and dried in an oven at 75 °C for 1 week to obtain weed biomass. At

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Raymond Kruse and Ajay Nair

. Aboveground cover crop biomass was collected on 4 Aug. 2014 before cover crop soil incorporation. Cover crop biomass was collected using two 0.25-m 2 quadrats from each cover crop plot. Weed biomass (root + shoot) was also pulled from the same quadrat. Weeds

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Dennis N. Portz and Gail R. Nonnecke

month for monocot and dicot weed biomass in each year and by year for strawberry plant density and yield. Weeds in the spring (May and June in the Midwest) reduce plant and fruit growth, pollinator activity, ease of fruit harvest, and customer