Insect problems in crops for processing

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Abstract
The differing motives of growers, processors and the public for controlling pests are discussed, and effects of changes in crop production systems are noted.For each crop/pest/market problem, damage by particular pests has a unique importance and can be expressed as the frequency of occurrence of damaged crop produce (‘units’) and the amount of damage done to each. By reference to pests of vegetables, damage is classified according to whether it prevents the plant reaching maturity, or affects the unmarketed or the marketed part of the plant.A distinction is made between the efficiency and the effectiveness of control measures. Their limitations and associated problems are also discussed.