Preemergence Weed Control in Direct-Seeded Watermelon

Abstract

Studies were conducted at eight sites during a 3-yr period in Oklahoma and Arkansas to determine the effectiveness and safety of preemergence applications of halosulfuron both alone and in tank mixtures with bensulide, clomazone, ethalfluralin, and naptalam. Ethalfluralin, naptalam plus bensulide, and sulfentrazone also were applied alone. Although halosulfuron caused up to 20% seedling stunting, watermelon plants recovered by 5 to 7 wk after planting, and yield was similar to that of hand-weeded plots. Halosulfuron treatments controlled hophornbeam copperleaf, Palmer amaranth, carpetweed, and cutleaf groundcherry 80 to 100%. Control of goosegrass was at least 97% with clomazone plus ethalfluralin plus halosulfuron. Injury to watermelon treated with sulfentrazone ranged from 76 to 98% at 2 to 4 wk after treatment. This was reflected by yields that were lower than any other herbicide treatment in the studies.

POST Weed Control Using Halosulfuron in Direct-Seeded Watermelon

“…Although part of the weed control observed in this study was due to the PRE application of ethalfluralin, the effect of halosulfuron was substantial. For example, ethalfluralin PRE at double the rate used in the present study provided less than 50% control of cutleaf groundcherry (Brandenberger et al 2005a). Ethalfluralin also provided partial, but not complete, control of pigweed and eclipta in the present study.…”

“…On the basis of our experience, cutleaf groundcherry is a weed that can be difficult to control in vegetables. Pigweed is readily controlled with PRE application of halosulfuron in direct-seeded watermelon (Brandenberger et al 2005a). Some pigweed species are listed as being controlled by POST applications of halosulfuron in agronomic crops.…”

“…Several herbicide options are available for use at the time of planting (Boyhan et al 1995;Mitchem et al 1997) and combinations of herbicides have been used to broaden the spectrum of weed control in melon crops (Umeda 2002). More recently, an additional option is the PRE use of halosulfuron, which was evaluated by Brandenberger et al (2005a) and found to be effective for controlling several broadleaf weeds in watermelon. Halosulfuron is approved for use in several cucurbit crops and the specific uses vary with crops (Anonymous 2005).…”

Controle em pré semeadura da cultura de soja de algodão voluntário tolerante ao glyphosate e amônio glufosinate e de Eleusine indica

“…Diferentes tratamentos com pré emergentes foram testados por pesquisadores, onde verificaram 100% de controle do capim-pé-de-galinha utilizando clomazone + ethalfluralin + halosulfuron (0,17 + 0,63 + 0,02 kg ha -1 i.a) (Brandenberger et al, 2005) e entre 74 a 100% de controle utilizando clomazone (0,8 kg ha -1 i.a.) (Scott et al, 2002).…”

Respuesta de 14 cultivares de melón (Cucumis melo L.) al cletodim

“…intRoducción entre las alternativas químicas para el control de malezas y otras plagas en el cultivo de melón se han evaluado aplicaciones al suelo de los fumigantes: metam sodio, metam potasio, yoduro de metilo, dazomet, 1,3-dicloropropeno y cloropicrina, entre otros (Brandenberger et al 2005).…”