Reaction of tangerines genotypes to Elsinoe fawcettii under natural infection conditions

Abstract

A citrus scab disease, caused by Elsinoe fawcettii, is currently found in all citrus areas throughout Brazil. Thatbeing, given the importance of this casual agent, the behavior of tangerines and hybrids influenced by this pathogen wasevaluated under natural infection conditions. This study was performed with plants around 15 years old without irrigation;100 fruits of three plants were collected during harvest season, using a grade scale varying from 0 (absence of symptoms) to6 (severe symptoms) the level of disease severity was determined. Among the cultivars, citrus scab resistance was observedin Citrus deliciosa, C. tangerina, C. nobilis; a mandarin hybrid (C. nobilis x C. deliciosa) and a satsuma hybrid (C. unshiu xC. sinensis). Among

Keywords

• Citrus scab
• citrus crop
• resistant varieties.