TROPICAL PLANTS AFFLICTED BY GALL-FORMING BACTERIA
MANAGEMENT RECOMMENDATION CONTINUED
Crown Gall
Olive Knot
Croton
Dwarf Schefflera
Euonymus
Sedum
Ficus
Succulents
Mandevilla
Loropetalum
+ A void introducing the pathogen by closely inspecting new plant material for galls + A ll plants with galls should be removed and discarded + C ontrol of crown gall requires sanitation and exclusion
Photinia
Mandevilla
Rose
Oleander
Schefflera
MANAGEMENT RECOMMENDATION + Biological control of crown gall has been possible on some woody ornamentals with Galltrol- A® ( A. radiobacter , strain K84) and NoGall ( Agrobacter radiobacter , strain K-1026). + Significant work has been done for control of olive knot in olives. In this case, use of copper spray timed for 2 days after leaf fall has been most effective. Use of copper sprays at other times was not significantly effective.
+ U se of disinfectants such as quaternary ammonium and
sodium hypochlorite to clean the production area including tools, benches, pots, etc., will help reduce disease
+ Considering ornamental production and Florida conditions, copper sprays may not be helpful.
+ Immediate use of a copper spray after pruning may be helpful but no work has been reported to demonstrate this
Reach out to your Harrell’s rep for more information.
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