EVALUATION OF SPANISH ISOLATES OF Plasmopara halstedii FOR TOLERANCE TO METALAXYL / EVALUACIÓN DE AISLADOS ESPAÑOLES DE Plasmopara halstedii POR SU TOLERANCIA A METALAXYL / ÉVALUATION DES ISOLATS DU CHAMPIGNON Plasmopara halstedii D’ORIGINE ESPAGNOLE D’APRÈS LEURS RÉACTIONS AU MÉTALAXYL
Year: 2000
Type: article
Abstract: SUMMARY One out of 42 Spanish isolates of P.halstedii ascribed to races 1, 2, 4, 6, 7 or 10 showed consistent tolerance to metalaxyl when seeds of sunflower ‘Peredovik’, treated with this fungicide at 2 g.a.i./kg, were inoculated by wholeseedling dipping. When this metalaxyl-tolerant isolate of P.halstedii was inoculated to sunflower seedlings by this method, the fungicide seemed to affect neither zoosporangia nor zoospores. In contrast, the incidence of seedlings with high sporulation on cotyledons after 10-12-day incubation was significantly decreased with increasing dosages of metalaxyl applied to the seeds of sunflower. EC 50 of this tolerant isolate of P.halstedii was estimated at 3.5-5 g.a.i./ kg.
Source: Helia
Institution: Instituto de Agricultura Sostenible
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W1691915281