Search Plant Disease Handbook

Fungi Imperfecti A major group of fungi for which no sexual production of spores is known. ...

Fungicide An agent that inhibits or kills fungi. ...

Fungistat A chemical or physical agent that prevents fungi from developing but does not kill them. ...

Fungus A single- or many-celled, naked or covered, irregular or filamentous organism, usually with a chitinous cell wall. Lacking chlorophyll and incapable of manufacturing its own food, it gets nutrition from dead or living plant or animal matter. ...

Gall Outgrowth or swelling of unorganized plant cells produced as a result of attack by bacteria, fungi, or other organisms. ...

Germinate To begin growth of a seed or spore. ...

Girdle To circle and cut through; to destroy vascular tissue, as in a canker or knife cut that encircles the stem. ...

Giant Cells Large, usually multinucleate cells formed by abnormal cell fusions or failure of proper cell wall formation following growth and nuclear division. Associated with nematode feeding. ...

Gram-negative (alternatively, Gram-positive) A negative (or positive) reaction to the standard Gram's stain for bacteria. ...

Haploid The chromosome number of the gametophytic generation or phase or having a single complete set of chromosomes. ...