Sequential and combined spray of herbicides to tomato field on weed reduction, fruit parameters and carryover residues

Yerra Pavani, Ponnusamy Janaki, Palanisamy Murali Arthanari, Ramasamy Jagadeeswaran, Arjunan Sankari, Alaguthevar Ramalakshmi and Chandrasekaran Bharathi
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Yerra Pavani: Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, India
Ponnusamy Janaki: Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, India
Palanisamy Murali Arthanari: Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, India
Ramasamy Jagadeeswaran: Department of Remote Sensing and GIS, Tamil Nadu Agricultural University, Coimbatore, India
Arjunan Sankari: Department of Vegetable Science, Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, India
Alaguthevar Ramalakshmi: Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, India
Chandrasekaran Bharathi: Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, India

Horticultural Science, vol. preprint

Abstract: Tomatoes are in great demand worldwide and consumed due to their nutritional and sensory qualities. Weed infestation poses a great challenge in tomato production, prompting growers to employ two to three herbicides in combinations and sequences for comprehensive control. Consequently, this study was undertaken to investigate the effects of glyphosate, pendimethalin, and metribuzin when applied individually or in sequential combinations in tomato fields. The herbicides significantly reduced the weed density and dry biomass and enhanced the weed control efficiency (WCE) compared to control. A tank mix spray of pendimethalin and metribuzin following glyphosate gave significantly higher WCE (80-91%) and fruit yield (88.47 t/ha). The tomato quality parameters were unaffected by the herbicides. The terminal residues in fruits were found below the safe limit of 0.1 mg/kg for glyphosate and 0.01 mg/kg for pendimethalin and metribuzin. Moreover, there was no evidence of residual carryover toxicity from the applied herbicides, as confirmed by the plant bioassay and instrumental techniques. However, continuous spraying of herbicides repeatedly in succession and in combination necessitates long-term monitoring to assess the potential development of herbicide-resistant weeds, the bio-magnification of residues in soil, their transfer to tomato fruits and the impact on the food chain.

Keywords: fruit quality; herbicides persistence; phytotoxicity; tank mix; weed control (search for similar items in EconPapers)
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlhor:v:preprint:id:41-2024-hortsci

DOI: 10.17221/41/2024-HORTSCI

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