Control of Sugarcane Smut Disease Incited by Sporisorium scitamineum Syd. Using Peroxyacetic Acid (PAA)

Abstract

n eco-friendly agent, hydrogen peroxide (H 2 O 2)-based compound, peroxyacetic acid (PAA) gave efficiency against Sporisorium scitamineum teliospore viability. A significant sporocidal effects for all AA + H 2 O 2 combinations tested against S. scitamineum teliospores germination was explored. The highest inhibitory effect (69.9% inhibition) was exhibited at 0.2 AA + 4.0 H 2 O 2 g/L followed by 0.1 AA + 4.0 H 2 O 2 g/L (51.9% inhibition) and 0.2 AA + 2.0 H 2 O 2 g/L (48.9% inhibition). Under field experiments, most of AA + H 2 O 2 treatments were reduced smut disease incidence (SDI) significantly. However, SDI values showed insignificant variances among four treatments, 0.1 AA + 1.0 H 2 O 2 g/L, 0.1 AA + 2.0 H 2 O 2 g/L, 0.1 AA + 4.0 H 2 O 2 g/L and 0.2 AA + 1.0 H 2 O 2 g/L, in two planting dates. While the two treatments, viz. 0.2 AA + 2.0 H 2 O 2 g/L and 0.2 AA + 4.0 H 2 O 2 g/L, showed significant variances values in SDI as they significantly reduced SDI values in May more than in October. Meantime, means of protection values (MPV) of 0.2 AA + 2.0 H 2 O 2 g/L and 0.2 AA + 4.0 H 2 O 2 g/L, showed significant variances in MPV values as they were significantly raised in May being 86.55% MPV more than in October, 70.85% MPV. In May planting date, MPV was significantly higher than in October planting date particularly in the check plants.

Eco-friendly Control Traits of Common Bean Root Rot Caused by Macrophomina phaseolina (Tossi) Goid and Fusarium equiseti Using Fungicide Alternatives

“…Application of 0.2g/l AA+2.0g/l H2O2 as seed soaking resulted in resistant bean plant against Fusarium equiseti 20% protection and against Macrophomina phaseolina 47.0% protection. PAA is considered an environment-friendly product with a reported antifungal activity against Rhizoctonia solani and Botrytis cinerea (Narciso et al, 2007;Ayoub et al, 2017;Jo et al, 2019) and other phytopathogenic fungi (Galal, 2017;Galal, 2018 andTantawy et al, 2020).…”

“…Preparation of the peroxyacetic acid (PAA): Stock solutions of two mixtures of acetic acid (AA) and hydrogen peroxide (H2 O2) were prepared with distilled water then left for at least 10 days before they tested (Galal, 2018). Different concentrations of AA+ H2 O2 mixtures, i.e.…”