THE STUDY OF THE CULTURAL- MORPHOLOGICAL FEATURES OF PHYTOPATHOGENIC FUNGUS ACREMONIUMSP. 502

G V Tsekhmister

doi:10.35868/1997-3004.20.49-53

Abstract

The paper provides the description of cultural-morphological features of phytopathogenic fungus Acremonium sp. 502 belonging to the group of slow-growing bacteria. The highest radial growth rate was achieved on a potatoglucose agar (0.1375 ± 0.0011 mm/h); the optimum medium pH was 8.5; the optimum temperature — 26 °C.

Highlights

Representatives of Cucurbitaceae family are valuable crops and rank third by acreage in Ukraine
The disease was first described in 1994 in Spain on melon plants [10]. The following year it was recorded in Texas on melon and watermelon plants [12] and in 1996 it was established that the causative agent was Acremonium cucurbitacearum [18]
It is know that the representative of Acremonium genus caused the similar disease of melons observed in California [11]

Summary

Introduction

Representatives of Cucurbitaceae family are valuable crops and rank third by acreage in Ukraine. Representatives of Acremonium genus can cause disease to plants of Cucurbitaceae family [15]. The main abiotic factor affecting the spread and development of cucumber diseases is temperature. D. Gubler [17] noted that the disease of seedlings of that family caused by A. cucurbitacearum was lower at 17°C and much higher at 27°C, with an optimum at 24°C. Gubler [17] noted that the disease of seedlings of that family caused by A. cucurbitacearum was lower at 17°C and much higher at 27°C, with an optimum at 24°C Another important factor is the pH of the medium in which the fungus develops. For each strain of pathogenic microorganisms there are certain optimal limits of pH This factor influences the growth and development of the fungus, and its ability to produce different metabolites that affect the plant [1]. It is known that Pénicillium variabelis, Fusarium bullatum and F. oxysporium can grow within 2.0-11.0 pH limits [3]

Objectives

Methods