Weed Management Strategies for Tomato Plasticulture Production in Florida

Tiwari, Ravi; Bashyal, Mahesh; Kanissery, Ramdas

doi:10.3390/plants11233292

Cited by 6 publications

(2 citation statements)

References 78 publications

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“…Weeds pose a significant challenge to crop production, as they compete with crops for essential resources such as soil nutrients and water [1,2]. To address this issue, chemical herbicides have been widely used and have introduced significant benefits to agriculture [3].…”

Section: Introductionmentioning

confidence: 99%

The Aqueous Extract of Brassica oleracea L. Exerts Phytotoxicity by Modulating H2O2 and O2− Levels, Antioxidant Enzyme Activity and Phytohormone Levels

Wang,

Zhao,

Dong

et al. 2023

Plants

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Allelopathic interactions between plants serve as powerful tools for weed control. Despite the increasing understanding of the allelopathic mechanisms between different plant species, the inhibitory effects of B. oleracea on weed growth remain poorly understood. In this study, we conducted experiments to demonstrate that B. oleracea extract can suppress the germination of Panicum miliaceum L.varruderale Kit. seeds as well as of the roots, shoots and hypocotyl elongation of P. miliaceum seedlings. Furthermore, we observed that B. oleracea extract reduced the levels of hydrogen peroxide and superoxide anion in the roots while increasing the activities of catalase and ascorbate peroxidase. In the shoots, B. oleracea extract enhanced the activities of superoxide dismutase and peroxidase. Moreover, the use of the extract led to an increase in the content of phytohormones (indole-3-acetic acid, indole-3-acetaldehyde, methyl indole-3-acetate, N6-isoPentenyladenosine, dihydrozeatin-7-glucoside, abscisic acid and abscisic acid glucose ester) in P. miliaceum seedlings. Interestingly, the aqueous extract contained auxins and their analogs, which inhibited the germination and growth of P. miliaceum. This may contribute to the mechanism of the B. oleracea-extract-induced suppression of P. miliaceum growth.

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Section: Introductionmentioning

confidence: 99%

The Aqueous Extract of Brassica oleracea L. Exerts Phytotoxicity by Modulating H2O2 and O2− Levels, Antioxidant Enzyme Activity and Phytohormone Levels

Wang,

Zhao,

Dong

et al. 2023

Plants

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“…Weed management is a crucial and common practice for the profitability of citrus orchards (Kanissery et al 2022a). Herbicides are known to reduce weeds, improve access to trees, and increase crop yield; however, rigorous weed control has often resulted in a nonjudicious use of herbicides at increased rates and frequencies (Tiwari et al 2022). Despite the extensive use of diuron in citrus orchards, there is limited information available concerning the nontarget effects of diuron on citrus trees, particularly those affected by HLB disease.…”

mentioning

confidence: 99%

Nontarget Effects of Preemergence Herbicide Diuron in Hamlin and Valencia Sweet Orange (Citrus sinensis L. Osbek) in Florida

Timilsina,

Batuman,

Alferez

et al. 2023

horts

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The prevalence of Huanglongbing (HLB) disease, also known as citrus greening, has compelled the citrus industry to change management practices to increase production. However, these changes, such as enhanced nutrition and irrigation programs, have caused weed proliferation, subsequently leading to increased use of herbicides. Thus, our study evaluated a popular preemergence herbicide active ingredient, diuron, for nontarget impacts on young Hamlin and Valencia sweet orange (Citrus sinensis L. Osbek) trees in two commercial orchards in southwest Florida. The treatments included the preemergence application of diuron at three rates (1.8, 3.6, and 7.3 kg a.i./ha), a weed-checked control (using postemergence herbicides: glufosinate ammonium + saflufenacil), and a nontreated control. The treatments were applied twice (in Fall 2021 and Spring 2022) in a randomized complete block with four replicates. Results indicate that over a 5-month period, the application of diuron generally had no significant impact on citrus root growth. Further, over a 2-month observation period for Hamlin and a 4-month observation period for Valencia, it was found that diuron application had no notable effect on fruit detachment force. Valencia trees treated with diuron high showed higher HLB disease severity at location 1. In addition, Hamlin trees treated with diuron low and medium showed higher fruit drop (∼19% more) than the untreated control at location 1. However, this trend was inconsistent across the locations and cultivars. This result suggests that increased disease severity and fruit drop were not associated with diuron treatment. Thus, our study finds diuron as a tree-safe option for preemergence weed suppression in citrus production, as long as it is used in accordance with the recommended dosage and restrictions stated on the herbicide label.

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Purple nutsedge management in tomato plasticulture: A study on the effectiveness of preemergence herbicide S‐metolachlor and its co‐application with fertilizer enhancer and chelated iron

Tiwari,

Sapkota,

Boyd

et al. 2024

Agrosystems Geosci & Env

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Purple nutsedge (Cyperus rotundus L.) poses a significant challenge to Florida tomato (Solanum lycopersicum L.) producers due to its ability to puncture plastic mulch, resilient tubers, and rapid rhizome proliferation. Preemergence herbicides effectively suppress purple nutsedge in tomatoes under plastic mulch. Although the impact of co‐application of herbicides with fertilizers has been studied in row crops, its potential in vegetable plasticulture systems remains unexplored. This study aimed to evaluate the effectiveness and crop safety of the preemergence herbicide S‐metolachlor, both as a standalone treatment and in combination with a fertilizer enhancer or chelated iron in tomato plasticulture. Field trials at the University of Florida's Southwest Florida Research and Education Center, Immokalee, FL, involved applying S‐metolachlor at the recommended rate of 1 kg a.i. ha−1 on raised beds before installing plastic mulch. The herbicide was applied as a blanket spray alone, mixed with fertilizer enhancer, and coated on chelated iron fertilizer. Results indicate that using S‐metolachlor alone effectively reduced purple nutsedge density compared to the nontreated control in both trials I and II. Combining S‐metolachlor with fertilizer enhancer or chelated iron resulted in a >30% and 57% reduction in purple nutsedge density, respectively, compared to the nontreated control in trial II. These treatments did not adversely impact chlorophyll content or crop yield (p > 0.05) compared to the nontreated control. Notably, tomato yield significantly (p < 0.05) decreased with increased purple nutsedge density at 4, 8, and 12 weeks after transplanting. Overall, the results from both trials suggest that using S‐metolachlor is an effective approach to reduce purple nutsedge infestation in plastic‐mulched raised beds without negatively impacting tomato health and productivity.

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Weed Management Strategies for Tomato Plasticulture Production in Florida

Cited by 6 publications

References 78 publications

The Aqueous Extract of Brassica oleracea L. Exerts Phytotoxicity by Modulating H2O2 and O2− Levels, Antioxidant Enzyme Activity and Phytohormone Levels

The Aqueous Extract of Brassica oleracea L. Exerts Phytotoxicity by Modulating H2O2 and O2− Levels, Antioxidant Enzyme Activity and Phytohormone Levels

Nontarget Effects of Preemergence Herbicide Diuron in Hamlin and Valencia Sweet Orange (Citrus sinensis L. Osbek) in Florida

Purple nutsedge management in tomato plasticulture: A study on the effectiveness of preemergence herbicide S‐metolachlor and its co‐application with fertilizer enhancer and chelated iron

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