Field Guide of Discovery-based Exercises for - Aseanipm ...

314
Field Guide of Discovery-based Exercises for Organic Vegetable Production
Especially as a control against damping-off pathogens, compost tea preparations can be
used as water for irrigation after planting seeds and every time seeds or seedlings needs
watering. Using compost tea preparations as watering medium for two weeks will give
sufficient amount of control against soil-borne pathogens such as damping-off. For field
control of soil-borne diseases, compost tea can be incorporated into irrigation water.
5 Using compost tea as a foliar spray to prevent or limit disease development.
The compost tea can also be applied as a foliar spray but should be sieved thoroughly to
prevent clogging of spray nozzles. If conditions are favorable for disease development
and initial symptoms are visible, compost tea spray solution placed in a knapsack or any
common sprayer can be applied to leaves as a preventive spray or to limit spread and
development of disease.
3. Go back to learning field and do hands-on on compost source collection and compost tea
preparation in small group.
4. Return to processing area, process output in small group, and share experiences and lessons
learned to big group.
5. After one week, go back to learning field and do hands-on on compost tea application on
organically-grown vegetables slightly or moderately infected with diseases in learning field by
each small group.
6. Every week thereafter, return to processing area, process output in small group, and share
experiences and lessons learned to big group.
7. Synthesize and summarize output of small groups into one big group output. Draw up
conclusions and recommendations from this exercise.
some suggested questions for processing discussion
❏ What organically-grown vegetables were infected with plant diseases? Did you observe differences
in crop stand, disease severity, and others among different organically-grown vegetables?
❏ Did you observed disease-infected vegetables in adjoining fields of your learning field? What
are commonest plant disease infecting vegetables in nearby areas?
❏ What benefits can be derived from using compost tea to manage plant diseases of organicallygrown
vegetables?