Data di Pubblicazione:
2008
Citazione:
Razionalizzazione della difesa del riso da elmintosporiosi e brusone / C. Pizzatti, D. Bertocchi, P. Cortesi - In: Giornate fitopatologiche : atti : Cervia (Ra), 12-14 marzo 2008 / [a cura di] A. Brunelli, M. Collina. - Bologna : Clueb, 2008 Mar. - ISBN 88-491-3043-0. - pp. 439-444 (( convegno Giornate fitopatologiche tenutosi a Cervia nel 2008.
Abstract:
Epidemics of rice brown spot and rice blast were monitored for several years on different
cultivars. We evaluated the efficacy of known and new fungicides applied at different doses
and with different strategies based on rice phenology and diseases epidemiology. Leaf brown
spot generally preceded leaf blast. At maturity, disease severity on flag leaf seldom exceeded
10-15%. Panicle blast incidence reached 100% between grain set and milk ripeness growth
stages, but severity hardly exceeded 5%. Fungicides efficacy against Cochliobolus
miyabeanus (S. Ito & Kurib.) Drechsler ex Dastur on leaves varied considerably among
products, years, and application strategies and it was comprised between 6 and 67%. The best
results were obtained with two treatments of azoxystrobin or a tank-mix of fenbuconazole and
tricyclazole or iprodione and tricyclazole applied between booting and flowering growth
stages. The same fungicides gave good protection against panicle blast. The two-treatment
phenological strategy was not always better than one-treatment phenological strategy.
Tipologia IRIS:
03 - Contributo in volume
Keywords:
Cochliobolus miyabeanus, Magnaporthe oryzae, Oryza sativa, epidemiology,
fungicides
Elenco autori:
C. Pizzatti, D. Bertocchi, P. Cortesi
Link alla scheda completa:
Titolo del libro:
Giornate fitopatologiche : atti : Cervia (Ra), 12-14 marzo 2008