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Marei G.I.Kh., Abdelgalei S.A.M. (2018): Antifungal potential and biochemical effects of monoterpenes and phenylpropenes on plant pathogenic fungi. Plant Protect. Sci., 54: 9-16.To develop new natural fungicides, six monoterpenes and two phenylpropenes were tested for their antifungal activity against eight plant pathogenic fungi. The results of the mycelial growth inhibition assay showed that trans-cinnamaldehyde was the most potent compound against the eight tested fungi with EC 50 values ranging between 0.75 and 3.19 mg/l. This compound caused the higher mycelial growth inhibition than carbendazim. Furthermore, (-)-menthone exhibited strong antifungal activity against alternaria solani (EC 50 = 9.31 mg/l), Penicillium digitatum (EC 50 = 16.14 mg/l), and rhizoctonia solani (EC 50 = 24.69 mg/l). Likewise, eugenol showed potent antifungal activity against P. digitatum, r. solani, Fusarium solani, and a. solani, whereas EC 50 values were less than 30.0 mg/l. In a separate experiment, trans-cinnamaldehyde, p-cymene, eugenol, and (-)-menthone were evaluated for their inhibitory effects on pectin methyl esterase and cellulase. The tested compounds exhibited the pronounced inhibition of enzyme activities with trans-cinnamaldehyde being the most potent inhibitor for both enzymes.

The journal of Toxicology and pest control is one of the series issued twice by the Egyptian Academic Journal of Biological Sciences, and is devoted to publication of original papers related to the interaction between insects and their environment. The goal of the journal is to advance the scientific understanding of mechanisms of toxicity. Emphasis will be placed on toxic effects observed at relevant exposures, which have direct impact on safety evaluation and risk assessment. The journal therefore welcomes papers on biology ranging from molecular and cell biology, biochemistry and physiology to ecology and environment, also systematics, microbiology, toxicology, hydrobiology, radiobiology and biotechnology. www.eajbs.eg.net Provided for non-commercial research and education use. Not for reproduction, distribution or commercial use.