A network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests.
PestNet is a network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests. It started in 1999. Anyone with an interest in plant protection is welcome to join. PestNet is free and is moderated, ensuring that messages are confined to plant protection.
Pests > Pest Management > Chemical control > Synthetic pesticides > Fungicides > Captan & Thiram, taro damping-off, Samoa
March 2005. Damping off of taro seedling in Samoa. Only tap water is used for cleaning the seeds, which are grown in sterile Jiffy-7pots (treated with hot water). The seedling are watered with distilled water. Two fungicides have been purchased, Bravo and Forschek, but the opinion of members is being sought before they are used.
Usually, it is a Fusarium that causes the problem, but Rhizoctonia may also be there. Treat the seed with Captan or Thiram. If not, try Mancozeb or even copper oxychloride. Bravo is likely to be effective, too.
Other suggestions were incorporating more organic matter into the mix, sterilising the mix in an autoclave, and treating the seeds with garlic extract or bleach (1%). It would be best to water the seedling from the bottom, not the top of the pot.