For the protecting of our saltwater marsh, to enhance coastal resiliency in times of severe weather, and for healthy coastal ecosystems we need to ban the blanket spraying of methoprene.
When a natural ecosystem is molested with chemical interference, the balance between the organisms is disrupted and the dynamics of an ecosystem unravels, making it prone to a proliferation of some species and a paucity of others. This may lead to epidemiological consequences whereby the ecosystem degenerates and may become more susceptible to disease organisms. Research already shows that nature has in place a predator-prey system controlling the proliferation of mosquitoes. A sample list of aquatic insect larvae that prey upon mosquito larvae includes: dragonﬂies (Anisoptera), the (salt marsh) seaside dragonlet (Erythrodiplax berenice), damselﬂies (Zygoptera), diving beetles, backswimmers and water boatman (Notonectidae). The effectiveness of these insects eating mosquito larvae is already well established: Prey Capture by Dragonﬂy Larvae (Odonata), Gordon Pritchard, Canadian Journal of Zoology, 1965 Aquatic Insects as Predators of Mosquito Larvae, Humberto Quiroz-Martinez, Journal of the AMCA, 2007. Methoprene prevents an insect larvae from properly molting to the next stage of development. Methoprene concentrations are impossible to maintain at a desired level when sprayed in the environment. Thus, any insect larva (or lobster larvae) in a methoprene-sprayed area is subject to its ill effects. Methoprene locks up the transition of underwater larvae to ﬂying insects, effectively killing them. This raises the likelihood that there will be less natural predator insects to eat the mosquito larva, thus necessitating an endless spraying program in a downward spiral of the natural checks and balances of a water system environment. Insects are closely related to other arthropods such as shrimp, lobsters and amphipods (small crustaceans that break down vegetation on salt marshes). It has already been shown that methoprene can affect other arthropods such as lobsters. Lobster larvae need to molt. And they continue to do so as adults every year. Bioaccumulation and Metabolic Effects of the Endocrine Disruptor Methoprene in the Lobster, Michael Horst, Integrative and Comparative Biology, 2005. There will always be mosquitoes. Predatory insects have historically kept mosquito populations in check. The introductions of chemical approaches to control mosquitoes have consistently led to damage in the environment (DDT, malathion). Mosquitoes have continued to remain and seasonally proliferate, despite the fact that methoprene has been sprayed and dropped into our waters since 1975. Mosquitoes have a short life cycle, from egg to larvae to ﬂying insect, of 10 to 14 days, Their predators, especially the dragonﬂies, may take weeks or months to proceed through the underwater larval stage. It is not hard to deduce that by interfering with the insects that eat them, there may be more mosquitoes. Application of methoprene would then lead to short term reduction of mosquitoes, but long term proliferation.