But Kinerk says it is more than worth it to trade the fast action of synthetic pesticides for alternative pesticides, which are generally less toxic. And he says an increasing number of people agree. Kinerk started producing and distributing alternative pest-control products in 1984, because he says organic products were not easy to obtain at the time. After the sponge is soaked in tepid water for five to ten minutes, the nematodes migrate out. You then mix the nematodes with water and apply them in a sprayer or sprinkling can to combat soil insects.
Selectivity means that the pesticide kills certain pests, rather than a wide range of insects.
Without natural predators such as lady beetles to held keep pests in check, you couldn't spray enough to control pests.