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

learning objectives
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Field Guide of Discovery-based Exercises for Organic Vegetable Production
• To make participants aware and understand that different solanaceous vegetable diseases are
caused by different plant pathogens; and
• To learn a practical method in identifying bacterial diseases of organically-grown solanaceous
vegetables.
materials
• Fields planted to different organically-grown solanaceous vegetable crops infected with
different diseases; and
• Office supplies (e.g., Manila papers, notebooks, ball pens, and marking pens).
methodology
• Field walks, hands-on, and brainstorming
steps
1. Divide participants in small groups and ask them to conduct field walks and observe as many
organically-grown solanaceous crops in learning and adjoining fields infected with different
diseases. Search for partially wilting plants, observe symptoms, pull plants, and bring them
to processing area. List down all observations related to pest and disease occurrence, kind of
crops planted, crop stand, etc.
2. Go back to processing area, cut roots of plants, and observe them. Cut a part of stem above
ground level to about 5-cm length. Insert toothpick into stem part and hang it in a glass of
water. Leave glass for a few minutes. Do the same process using tubers, roots, and different
parts of stem. Observe ooze coming out of stem-base (e.g., bacterial wilt). Compare different
set-up.
3. Brainstorm in small groups and present output to big group. Conduct participatory discussions
to allow sharing of experiences among participants and facilitators.
4. Synthesize and summarize output of small groups into one big group output. Draw up
conclusions and recommendations from this exercise.