The efficacy of 8‐hydroxyquinoline derivatives in controlling the fungusIlyonectria liriodendri, the causative agent of black foot disease in grapevines

Abstract

Aim: The purpose of this study was to evaluate the in vitro and in vivo efficiency of derivatives of 8-Hydroxyquinoline (8HQ) in controlling the fungus Ilyonectria liriodendri. Methods and Results: The in vitro tests consisted of assessing its susceptibility to the minimal inhibitory concentration (MIC) and the inhibition of mycelial growth. While the in vivo tests consisted of applying and assessing the most effective products for the protection of wounds, in both preventive + curative and curative forms. The MIC values for PH 151 (6Á25 µg ml À1 ) showed better results when compared to the fungicides tebuconazole (>50 µg ml À1 ) and mancozeb (12Á5 µg ml À1 for strain 176 and 25 µg ml À1 for strain 1117). PH 151 significantly inhibited mycelial growth, while mancozeb did not differ from the control. In in vivo tests, PH 151 again demonstrated excellent results in vitro, especially when applied preventively. Conclusions: The derivative of 8HQ PH 151 was effective in controlling the fungus I. liriodendri in vitro and proved to be a promising option for protecting wounds. Significance and Impact of the Study: This study points to the prospect of an effective and safe preventive antifungal product, which would enable the use of pesticides in vine culture to be reduced.

Assessment the Efficiency of the Bioagent Bacillus velesensis and the Biohealth Formula with Fungicide Beltanol in Control of Fusarium solani Causing Pepper Root Rot

“…Beltanol's toxicity to pathogenic fungi results from its ability to generate chelating compounds with copper within the cells of the pathogen, releasing and killing the pathogen in the process [48]. One of the substances derived from the pesticide's active ingredient, 8-Hydroxyquinoline, has shown its inhibitory efficiency against a number of plant-pathogenic fungi, including Sclerotinia sclerotiorum, Fusarium graminearum, Magnaporthe oryzae, and Ilyonectria liriodendra; this substance's effect on fungi is thought to be the result of causing distortion [49]. As for Biohealth, its effectiveness is attributed to the elements included in its composition (B.subtilis, T.harzianum, marine algae and humic acid).…”

The in vitro effects of selected substances and nanomaterials against Diaporthe eres, Diplodia seriata and Eutypa lata

“…In F. oxysporum , 73% inhibition was observed. Souza et al (2021) tested the 8‐HCH derivative PH 151 (8‐hydroxyquinoline‐5‐[N‐4‐chlorophenyl] sulphonamide) against Ilyonectria liriodendri . PH 151 showed significant inhibitory activity at a concentration of 6.25 mg L −1 .…”