Field bindweed (Convolvulus arvensis L.) control with post-emergence herbicides in flowering stage in apple orchards

Document Type : Research Paper

Authors

Abstract

Field bindweed is a deep rooted prenial weed that is resistant to drought in Iran. Herbicide applications indicates the low control of this weed. However, little data are available to verify efficacy with repeated treatments in flowering stage in the orchards in Iran. These experiments were conducted in the completely randomized designe with four replications and 13 treatments in Tehran and Isfahan. Treatments were post emergence applications of glyphosate (Roundup, SL 41%) at 2%, 3% and 4% plus amonium sulphate, new glyphosate (Weedmaster, SC 35%) at 0.75% and 1%, amitrol+ ammonium thiocyanate+ glyphosate (Illico, Sl 30.9%) at 4%, 5% and 6%, triclopyr (Garlon, EC 60%) at 1% and 1.5%, fluroxypyr (Starane, EC 25%) at 0.5% and 0.75% and control (without herbice). Treatments in Tehran reduced field bindweed growth 100%. However, 3 to 4 months after the treatments, stem regrowth was 0%. In Isfahan, fluroxypyr and triclopyr controlled field bindweed by 94 -97% on visual injury estimation. Furthermore, some herbicides reduced up to 93% field bindweed stem biomass and densities at the end of second year.

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