Insects are found in every single environment imaginable, from inside structures to under the water, and even in the snow. Good bugs aid the gardener in many ways. In recent decades, there has been interest in developing less toxic chemical pesticides, and more sparse regimens for application of these pesticides to avoid also killing beneficial insects during pesticide applications. In fact, only 5% of all the described species of insects are actually harmful in some way. these beneficial arthropods so they may be appreciated and conserved. Finding sustainable methods to control pest insects that affect crop yield is a pressing, worldwide concern for agriculture. Beneficial arthropods are categorized broadly as either predators or parasites. Encourage the students to take notes in the workbook spaces provided as each insect is discussed. OBJECTIVES: Students will be able to: ompare and contrast beneficial and pest insects. and shelter beneficial insects. A small minority of insects can be harmful to humans and other animals, but even those we consider pests often have important roles in the ecosystem and to other organisms. Even small amounts of seeds and brush will help beneficial insects survive the cold, wet months. Broad-spectrum insecticide use decreases predatory insects resulting in increased risk of secondary pest outbreaks, especially aphids. Gardeners and Identify and describe the ways that insects are beneficial and/or detrimental. Insect parasites develop in or on a They aid in production of flowers by pollination, destroy various weeds, improve soil conditions, and pray on harmful insects in the garden. In fact, many of them can be used to our benefit. LEAVES: Rake and dispose of leaves from fruit trees, especially if … Children encounter insects or by products of insects everyday. Beneficial Insects Predators, parasites, and pollinators are the most important beneficial insects. The beneficial insects will thank you – and so will your garden. Beneficial insects pollinate our flowers, and some can be used to reduce the populations of insects that we do consider to be pests. insects, spiders, mites, centipedes, and harvestmen— each with a unique, and usually bene!cial, role in keeping your backyard habitat healthy and function-ing ef!ciently. Project the What are Beneficial Insects PowerPoint Presentation to illustrate the talking points below. management practices that favor their survival and minimize harmful effects. 3. 1. Harmful insects are represented by the few plant-eaters (such as mites, aphids, and tent caterpillars) that congregate and feed, or occur in large numbers (thrips). (1996) recorded 500 beneficial insect species and 130 pest species. All other insects are beneficial or neutral. Beneficial insects can be used in your yard or garden to reduce populations of insects harmful to plants. a. The choice of a pesticide that is least toxic to beneficial insects and mites. The This includes the use of pesticides only when necessary and then, as spot sprays rather than blanket coverage of an area. Beneficial insects, or predatory insects, play an important role in natural pest suppression in alfalfa. Conserve beneficials by not using insecticides when pests are below economic thresholds. For example, in a study carried out in a single agro-ecosystem in rice fields in Indonesia, Settle et al. of beneficial insect species in the average agro-ecosystem typically far outweighs the number of harmful insect species. Predators include lady beetles, lacewings and spiders. Adult or immature stages of insect predators, or both, actively search out and eat prey insects. 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