Pests and Diseases Viewer

Galls



P_galls

Galls

Usually appear in

Spring to Autumn


Back to Pests and Diseases


Caused By:-     Many parasites, fungi, bacteria, insects, mites an

Description

Plant galls are abnormal growths of plant tissues and can be caused by a large variety of parasites, fungi, bacteria, insects, mites and damage to the plant. They are often highly organised structures from which the cause of the gall can often be determined. Some insects and microscopic bacteria and mites live inside the gall created when the insect, parasite, motes or bacteria first damage the tissues of the plant and often secretes hormones which stimulate the gall formation. As the gall grows the animal takes up residence in the gall. Fungal galls are usually solid throughout the gall, but other galls have highly specific structure from which the cause can be assertion. There are hundreds of different types of galls which are usually specific to a plant or parasitic initiator. In order to form galls the initiator must seize the time when plant cell division occurs quickly which is in the growing season. Some gall causing organisms are detrimental to other plants and may reside and spread in the soil and can damage several genus of plants. Some galls once they have been initiated will continue to grow even if the causal agent is eliminated. Picture from Wikimedia Commons.
See also these other Galls ACER GALL MITES, ACORN GALL MITES, AZELAE GALL, BEECH GALL MIDGE, BLACKCURRANT GALL MIDGE, BROOM GALL MIDGE, CAMELLIA GALL, CROWN GALL, EUONOMUS GALL, FELT GALL MITES, FORSYTHIA GALL, GALL WASP, GLEDITSIA POD GALL MIDGE, HEMEROCALLIS GALL MIDGE, HAWTHORN BUTTON TOP GALL MIDGE, KNOPPER GALL OF ACORNS, LEAFY GALL, LIME NAIL GALL MITE, OAK GALL WASP, PEAR LEAF BLISTER MITE, PINAPPLE GALL ALDELGID, PLUM GALL MIDGE, ROBINS PINCUSHION, VINE ERINOSE GALL MITE, VIOLET GALL MIDGE, WILLOW BEAN GALL SAWFLY.


Control

The exact cause of the galls must be determined before specific treatment can be administered, but most causal agents can be prevented by good plant husbandry.
Many galls can be ignored as they do not affect the plant in any significant way, but some like the Eounomous gall must be treated as soon as possible, perhaps even with soil sterilisation techniques.


Back to top