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Leafy Gall



P_leafygall

Leafy Gall

Usually appear in

Summer


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Caused By:-     The Bacteria Rhodococcus fascians

Description

Leafy gall is a bacterial disease of the stems and roots of many herbaceous plants. It is caused by the bacterium Rhodococcus fascians(formerly Corynebacterium fascians), which enters the plant through wounds in roots or stems and stimulates the plant tissues to grow in a disorganised way, producing dense clusters of distorted leafy shoots. These effects are mainly seen in the summer. Shoot proliferation and leafy galls are sometimes called fasciation, a term also used to refer to tissues that grow into a flattened ribbon-like manner. These usually appear near the soil line at the base of the stem or beneath the soil.
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, GALLS, GALL WASP, GLEDITSIA POD GALL MIDGE, HEMEROCALLIS GALL MIDGE, HAWTHORN BUTTON TOP GALL MIDGE, KNOPPER GALL OF ACORNS, LIME NAIL GALL MITE, OAK GALL WASP, PEAR LEAF BLISTER MITE, PINAPPLE GALL ALDELGID, PLUM GALL MIDGE, ROBINS PINCUSHION, TURNIP GALL WEEVIL, VINE ERINOSE GALL MITE, VIOLET GALL MIDGE, WILLOW BEAN GALL SAWFLY.


Control

The disease is not common and seldom severely damaging to warrant control, but if it is troublesome, carefully sterilise growing media, surfaces, tools and water the soil with a bactericide after removing some of the topsoil. All potentially contaminated growing media should be destroyed.
Bacteria need water for development, infection, and multiplication. Minimize the length of time leaves are wet and water under conditions where leaves can dry in 1-2 hours. Good ventilation will also help.



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