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

444
Field Guide of Discovery-based Exercises for Organic Vegetable Production
‘Pulling the guts’ technique is a practical tool used by farmers to determine the degree of larval parasitism
by Diadegma semiclausum wasp or diamondback moth (DBM) of crucifers.
Puzzle refers to a fun-type form of experiential learning that is designed to stimulate participant curiosity,
creativity, and a problem-solving orientation. In some cases, puzzle is used ‘just for fun.
record keeping is an essential activity in farming that furnishes valuable information about past
performance in specific areas of farming operations, which can be used together with other data
in determining future operations. Record keeping is important because: (1) it increases farmer’s
efficiency by providing him a basis in deciding where to put his resources; (2) it can be used for
planning and budgeting; (3) profitability of various operations can be evaluated; (4) it shows where a
farmer’s money comes from and where it goes; (5) a farmer’s capacity to pay is best shown by his farm
records; and (6) settling questions becomes easy if all transactions are well recorded.
repellent crops are crops with pest repelling properties, which are grown in-between or around the area
planted to vegetable crops to repel some specific destructive pests of a particular vegetable crop.
resistance is a fundamental principle in pest and disease management referring to the development and use
of cultivars that can thwart or impede activity or a pest or a pathogen.
resistant variety means any crop variety that can resist the adverse effect or damage caused by insect pests,
diseases, and adverse environment.
return on investment refers to the ratio between net return or income and the total cost of production in
every enterprise.
roguing refers to the removal of off-types in crops intended for seed production. It also means the removal
of diseased plants with the accompanying pathogens for disease management. Roguing must be done
continuously if it is to be successful.
role-playing is a learning technique in which participants act out and thus experience real-life roles and
situations. It is both a form of simulation and experiential learning.
root feeders refer to a group of destructive insects whose immature stages and some adults of insect feed on
living roots or base of plants, causing stunted growth or death of plants.
root knot nematode (rKN) is kind of nematode which causes swellings or knots on the roots of affected
plants known as galls. Plants affected by this nematode become stunted and wilt readily in hot, dry
weather.
root, tuber and bulb vegetables are vegetable crops primarily grown for their swollen underground stems
or roots. Examples are sweet potato, onion, garlic, carrot, radish, potato, and ginger.
sanitation is a practical cultural management practice aimed at reducing either the source of inoculums or the
exposure of the plants to infection. Sanitation excludes use of chemicals or biological control agents (BCA).