Effect of timing and number of sprays of benomyl, fenarimol, and other fungicides on ascospore production in<i>Venturia inaequalis</i>

Ross, R. G.; Newbery, R. J.

doi:10.1080/07060668109501939

Cited by 1 publication

(2 citation statements)

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“…Réduc-tions in ascospore numbers were observed only once (two sprays, 24 May). Thèse observations over two seasons contradicts previous reports of diminishing ascospore production with bitertanol (Gadoury and MacHardy 1984;Ross and Newbery 1981 ;Schwabe 1982). Leaves treated with diniconazole, flusilazole, and benomyl exhibited significant (P < 0.05) réductions in numbers of ascospores (Table 4).…”

Section: Resultscontrasting

confidence: 55%

“…Sterol-inhibiting fungicides hâve been shown to reduce the total numbers and the size of pseudothecia and to reduce significantly the numbers of ascospores during the primary infection season (Burchill and Hutton 1965;Gadoury and MacHardy 1984;O'Leary and Sutton 1986;Ross and Newbery 1981). In this study, réductions in the numbers of pseudothecia were observed in most treatments.…”

Section: Resultsmentioning

confidence: 56%

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Full-season and post-harvest applications of sterol-inhibiting fungicides to reduce ascospore formation in Venturia inaequalis

Biggs¹,

Warner²

2005

phyto

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Nous avons évalué plusieurs fongicides inhibiteurs de stérols lors de programmes de vaporisation en pleine saison ou en post-récolte en vue de l'inhibition de la formation d'ascospores par le Venturia inaequalis, agent pathogène de la tavelure de la pomme. Les traitements post-récolte avec le flusilazole et le diniconazole étaient comparables ou supérieurs à ceux utilisant le benomyl, avec une suppression de la production d'ascospores de 55 à 99 % ; cependant, le bitertanol a stimulé la production d'ascospores jusqu'à 52%. Lorsqu'appliqués neuf fois lors des programmes en pleine saison, le bitertanol, le flusilazole et le triflumizole ont réduit la formation d'ascospores à un niveau similaire ou supérieur à celui obtenu avec le dodine. Les programmes en pleine saison ont été efficaces à réduire la production d'ascospores.Several sterol-inhibiting (SI) fungicides were tested in post-harvest and full-season spray programs for the inhibition of ascospore formation by Venturia inaequalis, the causal fungus of apple scab. Post-harvest treatments with flusilazole and diniconazole were comparable to or better than those with benomyl and suppressed ascospore production by 55 to 90 %, although bitertanol stimulated ascospore production by up to 52 %. When applied nine times in full-season programs, bitertanol, flusilazole, and triflumizole reduced ascospore formation to a degree similar to or greater than that achieved with dodine. Full-season programs with SI fungicides in combination with mancozeb were highly effective for reducing ascospore production

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Section: Resultscontrasting

confidence: 55%

Section: Resultsmentioning

confidence: 56%