INSECTICIDES AND MYCORRHIZAE - CHLORFLUAZURON
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Insecticides are applied to crops to control insect pests, indirectly increasing crop production. These chemicals can have negative effects on other organisms in the environment that may negate the production gains. Newer insecticides tend to be more specific. Chlorfluazuron (Jupiter®) targets larvae of Lepidoptera and Coleopteira by interfering with chitin synthesis. Thus, killing beneficial Hymenoptera is unlikely. The effects of this insecticide on Glomalean fungi which form (vesicular-) arbuscular mycorrhizae were investigated. Spore germination of Gigaspora gigantea and G. rosea was severely inhibited in high concentration. However when the insecticide was sprayed on corn (Zea mays) seedlings, there was not a significant reduction in previously established mycorrhizae.