Module 10 - Fungicides Flashcards
what was one of the first substances to be used as a fungicide
sulphur
when and why was fungicide starting to be used seriously
in the 1800s in France to maintain grape production
what was the first modern fungicide and what was it used for
Bordeaux mixture (copper sulfate) to control mildew in grapes
what were some of the other substances in the 1920s-1940s that were used as fungicide
arsenic, antimony, selenium, thalium, zinc, and copper
most fungicides today are ______
organic
preventative/protectant/contact fungicides
prevent infection and establishment of pathogen
curative/systemic/eradicant fungicides
stops the infection process
protectant (fungicide)
fungistatic (inhibits growth) and must be applied frequently to suppress development
eradicant (fungicide)
fungicidal (kills fungi outright)
when does protectants work
day 1 and 2
when does eradicants works
day 1 - 4
seed treatment fungicides
applied to seed before seeding, or occasionally applied in-furrow
foliar application of fungicides
application to the crop sometime after emergence of the plants
limitations: seed treatments should not be used….
- to compensate for poor quality seed
- highly infected seed
- inadequate crop rotation
benefits of seed-applied fungicide
limits germination problems/aids in emergence and establishment
reduce risk of introducing disease
precision targeting
low dose
ease of application
