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PEST MANAGEMENT DECISION GUIDE: GREEN AND YELLOW LIST

Sclerotium rot on vanilla

Anthelia Rolfisii (syn. Sclerotium rolfsii var.rolfsii) Collar rot
Uganda
  • Establish plantation in fertile, well draining soils using recommended spacing of 10ft by 5ft for optimum growth
  • Select healthy disease free vines, put in a shade for 2 weeks to wither and heal wounds before planting
  • Apply well decomposed manure or mulch placed away from stem base to protect roots and increase crop health
  • Trim shade trees to maximum of 20 looped vines for optimum air flow and increased light penetration
  • Keep orchard weed free by mulching, slashing and hand-weed around the plant base. Avoid damaging roots/stem base that would create fungus entry points
  • Avoid excessive mulching during rainy season. And mulch with materials that are easily decomposed
  • Avoid excessive manuring and use of fresh cow dung
  • Phytosanitation through removal of diseased plant parts is important for effective functioning of fungal biocontrol agents and other beneficial microorganisms
  • Inspect plantations once a week during rainy season and once in 2 weeks during dry season
  • Look out for rots at the vanilla plant base and on pods.
  • Look out for yellowing, gradual withering and rotting of the vanilla plant at the base
  • At advanced stages, rotting spots have cottony whitish growth usually at the stem base
  • Look out for whitish cottony growth on the shoot tips and pods
  • Apply chemical control measures once 20%-30% of mature plants begin to wilt/rot
  • Apply green direct controls when the disease coverage is less than 20% of the garden
  • Prune, collect and burn diseased vines to reduce inoculum sources
  • Use bleach to disinfect tools during pruning to minimize disease spread
  • Reduce mulch where its excessive
  • Use Trichoderma harzianum based products
  • Spray on leaves and around the root zone, with a spray interval of 15 days. For the above foliar direct controls, spray once in a month during dry period and twice a month during the wet season to protect your crop and prevent further spread of the fungus.
  • When using a pesticide or botanical, always wear protective clothing. WHO toxicity Class II products may not be allowed in local IPM schemes. Do not empty pesticides into drainage or water sources
  • Always refer to the recent updated Pesticide list by the Department of Crop Protection, MAAIF, Uganda
  • Read the product label and follow the dosage/application rates or consult a Plant Doctor (Agric. Officer) nearest to you.
  • Never apply a fungicide and a biocontrol agent simultaneously. Apply one 15 days after applying the other
  • Tebuconazole.
  • WHO class II (Moderately hazardous). Toxic to fish/aquatic organisms. Maximum number of treatment is four applications per year. PHI14 days. REI: 12 hours. FRAC 3DMI11. Systemic. Possibility of resistance.
  • Soil drench and spray the plants with 0.2% Copper oxychloride at 2-3 litres per plant
  • WHO class U (unlikely to present hazardous effects in normal use)
  • Spray with carbendazim (e.g. Bavistan)
  • WHO class III (slightly hazardous)
AUTHOR(S): Semakula Alex (Kayunga District Local Government), Winnifred Aool Opio (NARO)

CREATED/UPDATED: May 2017/November 2019/ September 2020
PRODUCED BY: Plantwise

©CAB International. Published under a CC-BY-SA 4.0 licence.