Fungicidal Control ofEutypa armeniacaeInfecting Concord Grapevine in Michigan

Abstract

pruning wound of F. lateritium suspended in 5 gL sterile distilled water (SDW) was Field trials were conducted at four different dates in the winter and early spring of 1979-1980 and applied. The F. lateritium culture was also in 1981 in a commercial vineyard at Lawton, MI. In the 1979-1980 trials, a benomyl 50WP provided by M. V. Carter (Department of spray of 4.8 g/ L water (0.5 L per vine) gave significant control of ascospore infection by Eutypa Plant Pathology, Waite Agricultural armeniacae when pruning wounds on 2-yr-old wood were inoculated either on the day of pruning Research Institute, University of Adelaide, and spraying or 14 days later. A lower rate of benomyl 50WP, two rates of captafol 4F, and a Glen Osmond, South Australia). This biological control treatment of Fusarium lateritium gave little or no control. Pruning wounds inoculum was scraped off cultures declined in susceptibility over the 14-day period. No differences in susceptibility to infection were noted among the four dates of pruning. In the 1981 trial, benomyl 50WP showed significant disease growing on Difco potato-dextrose agar control at 1.2 and 9.6 g/ L water compared with water-treated control vines. (PDA) and suspended in SDW. Concentrations were determined using a hemacytometer. There were five vines per treatment in a completely randomized plot design. Eutypa dieback, also referred to ascospores by 65 and 100%, respectively After treatment, on the same day, 10 of previously as "dying arm" (12) or "dead (A. Trese, unpublished), the 20 pruning wounds per vine were each arm" (14), is an important disease of Macroconidial suspensions of Fusarium inoculated with 500 ascospores of F. grapevine worldwide, causing cankering lateritium Nees. were effective against E.

Protection of Grapevine Pruning Wounds against Eutypa lata by Biological and Chemical Methods

“…Several field trials have been conducted in the USA to demonstrate the potential of benomyl as a pruning wound protectant against Eutypa infections, either applied as a paint (Moller & Kasimatis, 1980;Pearson, 1982;Gendloff et al, 1983;Munkvold & Marois, 1993a), by means of a pneumatic sprayer-pruning shear (Munkvold & Marois, 1993a) or with an air-blast sprayer (Ramsdell, 1995). Benomyl has been registered in the USA as a paint application at 25 g/L for this purpose since 1976.…”

Developing pruning wound protection strategies for managing Eutypa dieback

“…Eutypa dieback can be controlled by protecting pruning wounds from infection by ascospores of E . lata (Moller and Kasimatis , Pearson , Gendloff et al , Munkvold and Marois 1993a,b, Lecomte et al , Bourbos and Barbopoulou , Rolshausen and Gubler , Sosnowski et al , , Halleen et al , Rolshausen et al ). Prior to the current study, only three pruning wound treatments were registered in Australia for the control of Eutypa dieback: Vinevax, a Trichoderma ‐based biological control (John et al ); Greenseal, a paint containing tebuconazole fungicide; and Garrison Rapid, a paste containing cyproconazole fungicide (Sosnowski et al ).…”

Novel quinazolinones and enniatins from Fusarium lateritium Nees

“…The agricultural importance of F. lateritium as both a biofungicide (2,5) and a bioherbicide (6) has been known for some time, although investigations into the metabolites of this organism have been limited to the isolation of the an-'~u t h o r to whom correspondence may be addressed. tibiotic lateropyrone (7), the mycotoxin diacetoxyscirpenol (8), and the insecticidal cyclodepsipeptide beauvericin (5,9).…”

“…tibiotic lateropyrone (7), the mycotoxin diacetoxyscirpenol (8), and the insecticidal cyclodepsipeptide beauvericin (5,9). The production of enniatins from F. lateritium has also been described; however, they were isolated as a mixture and only partly identified (5,9).…”

“…Eutypa armeniacae is an aggressive plant pathogen associated with sapwood necrosis (commonly known as "dieback disease") in fruit trees, grapevines, and ornamental plants around the world (2). Thus, an investigation into the metabolites of F. lateritium that exhibit antifungal activity against E. armeniacae was undertaken.…”