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

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Field Guide of Discovery-based Exercises for Organic Vegetable Production
Participatory technology development (PTD) is the process of collective and collaborative inquiry with the
purpose of initiating community actions on solving local problems.
Pest management means an ecologically-based strategy of maintaining pest population below the economic
injury level by the use of any or all control techniques that are economically and socially acceptable.
Pesticide is a compound or chemical, such as acaricide, insecticide, herbicide, fungicide, nematicide,
rodenticide, and the like, that is used to control pests and diseases.
Pesticide non-user refers to a farmer or individual that does not use any pesticide to control pests and diseases.
Pesticide user refers to a farmer or individual that uses pesticides to control pests and diseases.
pH is an expression of soil reaction (e.g., acid, neutral, or alkaline), which is the negative logarithm of the
hydrogen ion concentration. Acidity denotes an excess of H+ ions over OH- ions and alkalinity denotes
the opposite. At neutral reaction, the H+ and OH- ion concentrations are equal.
Phosphorus fertilizer refers to any fertilizer material containing phosphorus elements or nutrients.
Physiological disorders refer to all plant abnormalities or disorders that are caused by one of combination
of non-infectious organisms, nutrient deficiencies or toxicities, and chemical injuries or toxic residues.
Physiological maturity is when seed have accumulated all food reserves, is at its state of maximum dry
weight, and highest vigor and quality level.
Plant disease refers to any physiological disturbance brought about by a pathogen or environmental factor
that prevents normal development of a plant resulting to changes in its appearance and reduction of its
economic value. Plant diseases are caused either by infectious or biotic factors, or non-infectious or
abiotic factors.
Plant disease management consists mainly of integrating various mechanical or physical (e.g., heat
treatment, flooding, rouging of diseased plants or pruning of infected plant parts), cultural (e.g., crop
rotation, trellising) as well as biological (e.g., use of microbial antagonists, use of resistant varieties, biofumigation)
control methods.
Pod borer is lepidopterous pest attacking leguminous vegetables whose larvae are voracious feeders on
inflorescence with developing pods resulting to underdeveloped pods.
Pollinators are beneficial insects that pollinate flowers of some vegetable crops like cucumber, chayote,
snap beans, green peas, bell pepper and tomato. Wild bees and honeybees are the most predominant
pollinators of vegetables.
Potassium fertilizer refers to any fertilizer material containing potassium element or nutrient.