Mobility of oxathiapiprolin in and between tomato plants

Abstract

BACKGROUND: Oxathiapiprolin (OXPT; FRAC code 49) is a new piperidinyl-thiazole isooxazoline anti-oomycete fungicide that targets oxysterol-binding proteins. The fungicide is known to translocate acropetally from root to shoot to protect plants against fungal attack. RESULTS: OXPT is ambimobile. It can also translocate basipetally from shoot to root. OXPT exhibits an unprecedented capacity for trans-plant protection. When two tomato plants are grown in one pot, and one is treated with OXPT (on the stem, leaves or apex), while the other plant and soil surface are adequately covered, both plants become protected against late blight caused by Phytophthora infestans.CONCLUSION: Trans-plant systemic protection induced by OXPT involves translocation of the fungicide from the shoot of the treated plant to its root, exudation into the soil and uptake by the root of the neighboring untreated plant to protect it against the disease. Liquid chromatography-tandem mass spectrometry analyses confirmed the occurrence of OXPT in root exudates of OXPT-treated tomato plants in quantities sufficient to protect detached tomato leaves and intact plants against P. infestans.

Replacing Mancozeb with Alternative Fungicides for the Control of Late Blight in Potato

“…Here, the multisite fungicides RAN and MZ were applied once a week, whereas the site-specific fungicides REV and ZE were applied once every 9 and 21 days, respectively. At 12 and 18 dpi, disease severity in control plots reached 77.3% and 95.9%, respectively, while a single preventive spray of ZE allowed the disease to colonize only 0.4% and 5.7% of the foliage, respectively, reaffirming the prolonged control efficacy of ZE [48][49][50]. In both cases, REV, RAN, and MZ were significantly less effective than ZE.…”

“…Tomato plants were grown from seeds in 100 mL pots, while potato plants were grown from tubers in 250 mL pots. At the ten-leaf stage, plants were sprayed onto their upper leaf surface with a fungicide suspension containing 1, 10, 100, or 1000 ppm (product) and 3 h later inoculated with sporangial suspension (5 × 10 3 sporangia per mL) of isolate 164 of P. infestans as described before [48]. At 7 dpi, the disease control efficacy of a fungicide was determined according to the leaf area occupied by late blight lesions relative to control plants, as described elsewhere [49].…”

Inhibitory activity to Fusarium spp. and control potential for wheat Fusarium crown rot of a novel succinate dehydrogenase inhibitor cyclobutrifluram

“…For example, oxathiapiprolin applied to soil can translocate acropetally from root to newly developing leaves; it translocated basipetally from shoot to root when foliage was treated and exhibited substantial inhibitory activity against many plant-pathogenic oomycetes. 23,24 Enestroburin and SYP1620 have been shown to translocate systemically from roots to stems and ultimately to the leaves of wheat, and both inhibit a broad spectrum of fungi and oomycetes. 25 However, there is limited information regarding the translocation of cyclobutrifluram in the plant when applied to roots or seeds.…”

“…In the past several decades, various systemic fungicides have been used in plant disease control, which provided both protective and curative activity, and exhibited great trans‐plant systemic protection capabilities. For example, oxathiapiprolin applied to soil can translocate acropetally from root to newly developing leaves; it translocated basipetally from shoot to root when foliage was treated and exhibited substantial inhibitory activity against many plant‐pathogenic oomycetes 23,24 . Enestroburin and SYP1620 have been shown to translocate systemically from roots to stems and ultimately to the leaves of wheat, and both inhibit a broad spectrum of fungi and oomycetes 25 .…”

Study on the Design, Synthesis, Bioactivity and Translocation of the Conjugates of Phenazine-1-carboxylic Acid and N-Phenyl Alanine Ester

“…Among them, some crop root and vascular diseases are difficult to control through spraying because most systemic fungicides only acropetally translocate in the xylem. Therefore, many fungicides generally need to be applied by seed mixing and root irrigation [3][4][5]. However, seed coating and root irrigation treatments are accompanied by high cost, intensive labor and significant environmental pollution due to the complex nature of soil factors [6][7][8][9].…”