Articles
Oxyfluorfen: an excellent tool for tomato volunteer reduction in processing tomatoes
Article number
1445_10
Pages
67 – 70
Language
English
Abstract
More than 7,000 ha of processing tomatoes are cultivated in the irrigated valleys of the west of Argentina.
Volunteer tomatoes as weed become an issue when tomatoes are grown year after year.
Crop rotations with rye or barley in winter are not enough to promote seed germination of all tomato seeds, emerging later on in the main crop.
Oxyfluorfen use for controlling many kinds of weeds in tomatoes at different days before and after transplanting was studied and it was found promising at 240-480 g L‑1 a.i. ha‑1, however, registration and recommendation to control volunteer tomatoes is not cited for this purpose.
The objective of this study was to apply doses of oxyfluorfen before transplanting of processing tomatoes to evaluate tomato seedling phytotoxicity and plant survival on transplanted tomato seedlings, analyzing weed emergence reduction of tomatoes seedlings and other weeds.
Trials were conducted at INTA La Consulta Experiment Station, Mendoza, Argentina, Latitude South 33°42’ Longitude West 69°04’ altitude 947 m asl on a typical torrifluvent loamy soil during seasons 2021-22 and 2022-23. The study started with sprays immediately before planting with oxyfluorfen, Galigan® EC 240 g L‑1 sprayed in the plots as pre-planting herbicide in 400 L ha‑1 volume of water at 0, 144, 216 and 288 g a.i. ha‑1 doses.
No differences among all rates of oxyfluorfen on tomato seedlings plant growth at 30 days after transplanting (DAT) were found as well as in fruit production and fruit quality.
Strong plant number reduction on tomato volunteer plants among all herbicide rates against no oxyfluorfen treatment was found, however, no differences among oxyfluorfen doses were detected.
No phytotoxic plant symptoms were found among all treatments including control.
No statistical differences in fruit production either marketable or total, fruit size, soluble solids, green fruits, overmature, sunburns and blossom end rot (BER) index was found.
This means oxyfluorfen 144 g a.i. ha‑1, Galigan® 600 mL ha‑1 was enough to get the best, affordable and environmentally friendly weed control option for tomato volunteer plants as part of weed management on a tomato crop.
Volunteer tomatoes as weed become an issue when tomatoes are grown year after year.
Crop rotations with rye or barley in winter are not enough to promote seed germination of all tomato seeds, emerging later on in the main crop.
Oxyfluorfen use for controlling many kinds of weeds in tomatoes at different days before and after transplanting was studied and it was found promising at 240-480 g L‑1 a.i. ha‑1, however, registration and recommendation to control volunteer tomatoes is not cited for this purpose.
The objective of this study was to apply doses of oxyfluorfen before transplanting of processing tomatoes to evaluate tomato seedling phytotoxicity and plant survival on transplanted tomato seedlings, analyzing weed emergence reduction of tomatoes seedlings and other weeds.
Trials were conducted at INTA La Consulta Experiment Station, Mendoza, Argentina, Latitude South 33°42’ Longitude West 69°04’ altitude 947 m asl on a typical torrifluvent loamy soil during seasons 2021-22 and 2022-23. The study started with sprays immediately before planting with oxyfluorfen, Galigan® EC 240 g L‑1 sprayed in the plots as pre-planting herbicide in 400 L ha‑1 volume of water at 0, 144, 216 and 288 g a.i. ha‑1 doses.
No differences among all rates of oxyfluorfen on tomato seedlings plant growth at 30 days after transplanting (DAT) were found as well as in fruit production and fruit quality.
Strong plant number reduction on tomato volunteer plants among all herbicide rates against no oxyfluorfen treatment was found, however, no differences among oxyfluorfen doses were detected.
No phytotoxic plant symptoms were found among all treatments including control.
No statistical differences in fruit production either marketable or total, fruit size, soluble solids, green fruits, overmature, sunburns and blossom end rot (BER) index was found.
This means oxyfluorfen 144 g a.i. ha‑1, Galigan® 600 mL ha‑1 was enough to get the best, affordable and environmentally friendly weed control option for tomato volunteer plants as part of weed management on a tomato crop.
Authors
C.A. Argerich, P.A. Smith, M.M. Riquelme
Keywords
crop management, bed preparation, pre-plant herbicide, weed control
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