Phytopathology (1996) 86, p. S54 (Melo et al.)

I.S. Melo, A.M.R. Cassiolato and R.T. Frighetto (1996)
Development of mutants of Coniothyrium minitans with altered antibiotic production and potential for biocontrol of Sclerotinia sclerotiorum
Phytopathology 86 (11 suppl.), S54-S54
Abstract: C. minitans (Cm) is hyperparasitic to S. sclerotiorum (Ss), a pathogen of many economically important crops. In this paper we describe the isolation of improved mutants of Cm, using a UV irradiation regime, with altered antibiotic production and tolerant to high concentration of iprodione, which are effective against Ss. Three out of the 59 mutants obtained inhibited the mycelial growth of Cm. Infectivity of sclerotic by the new mutants (CM23, CM4b, and CM4c), was assayed by the plant-tissue-based system using carrot segments. More, than 80% of sclerotic were colonized by the mutants and wild-type. The mutants differed from their wild-type strain in appearance, morphology and sporulation.

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sclerotinia sclerotiorum
Paraconiothyrium minitans (antagonist)	Sclerotinia sclerotiorum