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Methods promoting plant resistance, as alternatives to chemical pest control, have increased due to their advantages over conventional insecticides. These advantages include preventing environmental pollution, biological instability or toxicity to farm workers, and residues in foods. This technique is also cheap, has a continuous action on insects, and is compatible with other control methods and therefore can be included in any pest management program. A resistant plant, due to its genotypic constitution, suffers less damage from insect attack than other plants under the same condition. Since resistance is the result of the relationship between plant and insect, identification of a resistant plant or variety can be done using parameters that consider the insect (e.g., difference in population, oviposition, consumption, duration of biological cycle, and fecundity) and the plant (e.g., difference in survival, destruction of different plant organs, production, and product quality). Observing the mechanisms by which a plant shows resistance to an insect, it can be verified that, in many cases, this involves changes in insect behavior and biology, while in other cases the plant itself ContEnts |
