Chemical pesticides are traditionally used as defense against crop damage. But chemical agents can be restricted, as in the production of certified organic crops. Good reasons exist for not using chemicals (better for the health of people and planet), and the reality is that pests happen. Enter biocontrol. Biocontrol, instead of chemical sprays, uses natural pest predators to protect crops. A common example is when gardeners release lady beetles (a.k.a. ladybugs) to control aphid populations. Homeowners may also be familiar with “Mosquito Dunks®” to control mosquito populations in standing water. That treatment contains a harmless (to humans) bacterium, Bacillus thuringiensis, which eats mosquito larvae.