LOSE LESS, FEED MORE
Plantwise is a CABI-led global initiative. www.plantwise.org
PEST MANAGEMENT DECISION GUIDE: GREEN AND YELLOW LIST
Bacterial wilt on tomatoes
Ralstonia solanacearum
Rapidly wilting plant due to
bacterial with (photo by A.
Massawe)
Prevention Monitoring Direct Control Direct Control Restrictions
Use tolerant and certified varieties
such as Prostar F1, Libra
F1,Taiwan F1, Kenton and Fortune
maker.
Carry out soil testing and avoid
planting in fields with infection
Practise crop rotation with non
solanaceaous plants e.g. cereals,
beans and cabbages.
Avoid planting in low wet areas
Destroy related plants of
Solanaceae family which act as
alternative hosts. Plants such as
night shades, sweet potato growing
near the tomato crop.
Avoid movement of farm
implements from infected to clean
fields. Ideally clean all implements
before using in the next field.
Avoid runoff water coming in
contact with uninfected fields.
Use recommended spacing
Bio-fumigate with mustard and
Radish
Begin scouting
throughout the
growing cycle right
from the nursery
Observe on the
vegetative parts for
the disease
symptoms such as
wilting of the entire
plant.
Start management
when one plant is
observed to show
symptoms.
Uproot and destroy by
burning and burying all
infected plants.
Apply Wood ash in the
affected holes after
uprooting plants
Carry all affected plants in
bucket or polythene bags
carefully as they are taken
for destruction to avoid
spread of the disease.
Carry out prolonged
flooding of fields where
bacterial wilt has been
present
Spray with Copper
oxychloride or Copper
hydroxide at 60gm/20 of
water.
Moderately hazardous
(WHO II)
Mode action: Copper
based fungicide
Toxic to aquatic
organism
Wear protective
clothing when
handling chemicals
Follow instruction on
the product label such
as dosage, pre-
harvest interval and
appropriate time of
application
Kenya
CREATED: July 2013
AUTHORS: Miriam Otipa(KARI), Rose Kamau(MOA), Maina Gekone(MOA), Nancy Murage (MoA), Dora Kilalo Dr. (Nairobi University),
Alfayo Ombuya (KEPHIS), Willis Ochilo (CABI), Eunice K. Ringera (KEPHIS), Margaret Mulaa (CABI), Mary Lucy Oronje (CABI)
EDITED BY: Melanie Bateman (CABI) and Erica Chernoh (CABI)
