Genetical Studies on Fungicide Resistance of Blast Fungus

Rice blast fungus sequenced

Rice (Oryza sativa L.) is a major staple food crop for half of the world’s population. The International Rice Research Institute, Philippines, estimates that in order to feed the growing global population, rice production must increase by another one-third by the year 2020. Magnaporthe grisea (anamorph, Pyricularia oryzae) causes rice blast disease (Figure 1) and is the most destructive pathoge...

Resistance to Phosphite Fungicide

There are a number of turf fungicides the activity of which is based on the phosphite (=phosphonate) ion (P03-). Chipco Signature fungicide (active ingredient fosetyl-Al) is the most common, and has become a "keystone" product for disease control programs on many golf courses across the country. This is in part because of the general enhancement in quality on stressed turfgrass that has been re...

Understanding Fungicide Resistance

Fungicide Resistance Management

Fungicides are important tools for managing diseases in many crops. Unlike insecticides and some herbicides which kill established insects or weeds, fungicides are most commonly applied to protect healthy plants from infection. To be effective, fungicides must be applied before infections become established and in a sufficient spray volume to achieve thorough coverage of the plant or treated ar...

Studies on "mosaic fungus".

The so-called "mosaic fungus" is a frequent finding in the routine examinations of skin scrapings for superficial pathogenic fungi. It may be found alone or with regular mycelium, with arthrospores or with both. There is, as yet, no agreement as to the nature of the "mosaic fungus," and the investigators may be separated into two groups—those who claim that the structure is an artefact (1—4) an...