Possibilities of chemical control of anthracnose (Colletotrichum spp.) in lupine crop

Abstract

The implementation of direct subsidies for legumes in recent years is one of the main factors causing growth of the area of, among others, lupine crops in Poland. Occurrence of diseases, including anthracnose, which is dangerous for lupine, reduces the quantity and quality of crops. There are only two active substances (thiophanate methyl and chlorothalonil) registered for spray application to control the symptoms of anthracnose during the vegetation season. In order to check the possibilities of reducing the severity of anthracnose symptoms and the growth of Colletotrichum spp. – the perpetrators of the disease, field and laboratory experiments were carried out. In studies with yellow and narrow-leaved lupine, the possibilities of using fungicides belonging to chemical groups other than previously registered fungicides were determined. Preparations containing such active substances as picoxystrobin and tebuconazole reduced the occurrence of anthracnose symptoms on yellow lupine in a year with very high disease pressure. Under in vitro conditions Colletotrichum spp. growth was limited the most by the active substances such as prochloraz, picoxystrobin and tebuconazole.