The research of feed components of minks (frozen fish and meat offal, dried haemoglobin, dried protein, wheat, barley, wheat and barley meal), and ready-mixed mink feed were investigated by mycological method in Sabouraud's Agar and Czapek Agar. The mycological examination of mink feedstuffs veriffed its contamination with Acremoniella atra, Alternaria spp., Aspergillus spp., Aureobasidium pullulans, Candida spp., Chaetomium spp., Cladosporium spp., Coremiella cubispora, Crysonilia sitophila, Curvularia spp., Fusarium spp., Gliocladium spp., Moniliella acetoabutans, Mortierella spp., Mucor spp., Penicillium spp., Sporothrix cyanescens, Stemphylium spp., Trichophyton terrestre, Zygosporium masonii, and Wangiella spp. Mycological examination of the mink liver, lungs and kidneys showed contamination with Acremonium spp., Actinomyces israelli, Arthrographis kalrae, Aspergillus spp., Aureobasidium pullulans, Candida spp., Chaetomium spp., Cladosporium bantianum, Cladosporium sphaerospermum, Conidiobolus coronatus, Curvularia spp., Emmonsia spp., Fonsecaea pedrosoi, Geotrichum candidum, Mucor spp., Penicillium spp., Scedosporium prolificans, Sporothrix cyanescens, and Wangiella spp.

Second to Black Sigatoka (Mycosphaerella fijiensis), Moko (Pseudomonas solanacearum race 2) is the most threatening disease to plantains and bananas. No resistance has been found on commercial varieties. It is present throughout Central America, as well as in Trinidad, Grenada, Brazil, Surinam, Venezuela, Colombia, Ecuador and Peru and suspected in the Dominican Republic. Its detailed distribution in Mexico, Nicaragua, Costa Rica, Venezuela, Colombia, Ecuador and Peru is described. Symptoms, pathogenesis and survival of race 2, which is pathogenic and divided into SFR, the major disease agent on bluggoe, and A and B are described. Disease control by elimination of diseased plants by glyphosate injections is detailed. Good control was achieved in 70 % of infected farms with a 90 day fallow after injection

Research is directed towards study of host-parasite relations. The 3 Sigatoka leaf spot pathogens, Mycosphaerella musicola (Yellow Sigatoka), M. fijiensis (Black Leaf Streak) and M. fijiensis difformis are compared morphologically and pathogenically. Species identification by electrophoresis on acrylamide gels has been studied, the species also differ in host range, geographical range, symptoms and distribution of lesions. Early tests of susceptibility of plantlets from meristem culture suggest that they react to infection in the same way as observed in the field

The leaf spot diseases of bananas and plantains, Sigatoka and Black Sigatoka, caused by Mycosphaerella musicola and M. fijiensis var. difformis are distributed worldwide and only in Central America respectively. Epidemiological studies are described in detail including seventy of the pathogens at different sites and correlation with climatic data. Susceptibilities of different banana and plantain genomic groups were found to be nearly identical for both diseases except that Black Sigatoka is more virulent so that both pathogens occupy the same ecological niche. A method developed to test the susceptibility of musa clones to Black Sigatoka using plantlets derived from shoot tip culture is described