Indirect Effect of Pesticides on Insects and Other Arthropods

Pesticides released to the environment can indirectly affect target and non-target species in ways that are often contrary to their intended use. Such indirect effects are mediated through direct impacts on other species or the physical environment and depend on ecological mechanisms and species int...

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Main Author: Francisco Sánchez-Bayo
Format: Article
Language:English
Published: MDPI AG 2021-07-01
Series:Toxics
Subjects:
Online Access:https://www.mdpi.com/2305-6304/9/8/177
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author Francisco Sánchez-Bayo
author_facet Francisco Sánchez-Bayo
author_sort Francisco Sánchez-Bayo
collection DOAJ
description Pesticides released to the environment can indirectly affect target and non-target species in ways that are often contrary to their intended use. Such indirect effects are mediated through direct impacts on other species or the physical environment and depend on ecological mechanisms and species interactions. Typical mechanisms are the release of herbivores from predation and release from competition among species with similar niches. Application of insecticides to agriculture often results in subsequent pest outbreaks due to the elimination of natural enemies. The loss of floristic diversity and food resources that result from herbicide applications can reduce populations of pollinators and natural enemies of crop pests. In aquatic ecosystems, insecticides and fungicides often induce algae blooms as the chemicals reduce grazing by zooplankton and benthic herbivores. Increases in periphyton biomass typically result in the replacement of arthropods with more tolerant species such as snails, worms and tadpoles. Fungicides and systemic insecticides also reduce nutrient recycling by impairing the ability of detritivorous arthropods. Residues of herbicides can reduce the biomass of macrophytes in ponds and wetlands, indirectly affecting the protection and breeding of predatory insects in that environment. The direct impacts of pesticides in the environment are therefore either amplified or compensated by their indirect effects.
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spelling doaj.art-28545bb1b6b84a75b103c721b42d3f302023-11-22T10:03:33ZengMDPI AGToxics2305-63042021-07-019817710.3390/toxics9080177Indirect Effect of Pesticides on Insects and Other ArthropodsFrancisco Sánchez-Bayo0School of Life and Environmental Sciences, The University of Sydney, Eveleigh, NSW 2015, AustraliaPesticides released to the environment can indirectly affect target and non-target species in ways that are often contrary to their intended use. Such indirect effects are mediated through direct impacts on other species or the physical environment and depend on ecological mechanisms and species interactions. Typical mechanisms are the release of herbivores from predation and release from competition among species with similar niches. Application of insecticides to agriculture often results in subsequent pest outbreaks due to the elimination of natural enemies. The loss of floristic diversity and food resources that result from herbicide applications can reduce populations of pollinators and natural enemies of crop pests. In aquatic ecosystems, insecticides and fungicides often induce algae blooms as the chemicals reduce grazing by zooplankton and benthic herbivores. Increases in periphyton biomass typically result in the replacement of arthropods with more tolerant species such as snails, worms and tadpoles. Fungicides and systemic insecticides also reduce nutrient recycling by impairing the ability of detritivorous arthropods. Residues of herbicides can reduce the biomass of macrophytes in ponds and wetlands, indirectly affecting the protection and breeding of predatory insects in that environment. The direct impacts of pesticides in the environment are therefore either amplified or compensated by their indirect effects.https://www.mdpi.com/2305-6304/9/8/177insecticidesherbicidesfungicidesparasiticidespestsaquatic insects
spellingShingle Francisco Sánchez-Bayo
Indirect Effect of Pesticides on Insects and Other Arthropods
Toxics
insecticides
herbicides
fungicides
parasiticides
pests
aquatic insects
title Indirect Effect of Pesticides on Insects and Other Arthropods
title_full Indirect Effect of Pesticides on Insects and Other Arthropods
title_fullStr Indirect Effect of Pesticides on Insects and Other Arthropods
title_full_unstemmed Indirect Effect of Pesticides on Insects and Other Arthropods
title_short Indirect Effect of Pesticides on Insects and Other Arthropods
title_sort indirect effect of pesticides on insects and other arthropods
topic insecticides
herbicides
fungicides
parasiticides
pests
aquatic insects
url https://www.mdpi.com/2305-6304/9/8/177
work_keys_str_mv AT franciscosanchezbayo indirecteffectofpesticidesoninsectsandotherarthropods