Fusarium Case Study

1296 Words6 Pages
water or fertilizer. It is not unusual for plants with root rot to regenerate new roots to replace those killed by the pathogen, but the newly developed root system may only support the plant when adequate moisture is available. Such plants may not show above ground symptoms well enough to be culled in the nursery prior to sale. As several pathogens can produce the same symptoms, and two or more pathogens may be affecting the nursery crop, nurseries need access to a professional diagnostic laboratory. Accurate identification of pathogens is essential to allow the correct decision to be made regarding disease management (Anon.2016g).
7.1. Phytophthora spp.: Phytophthora spp. generally attacks roots, often entering at injury points (Gray and Hine 1976). It infect living plant tissue, grow into and between plant cells and leave a necrotic lesion behind. Infection by Phytophthora usually starts at the root tip and rapidly involves all below ground parts of the plant and it is able to destroy the
…show more content…
Conidia and spores are normally dispersed by water splash although some are dispersed by air currents.
b) Species generally possess excellent saprophytic capabilities, and can survive for long periods as chlamydospores in host tissues, and as non-pathogenic parasites on alternative hosts.
c) Fusarium can be introduced into nurseries in a number of ways but most commonly with infected seed, corms or bulbs, cuttings and transplants. Seed coats can be contaminated with spores, or pieces of infected plant tissue, or there may be internal seed infection. Infected cuttings can be taken from apparently healthy plants.
7.4. Pseudomonas spp.: Wet and soft rot that affects any part of vegetable crops including heads, curds, edible roots, stems and

More about Fusarium Case Study

Open Document