One group of mites, Phytoseilus spp., are particularly helpful in controlling plant feeding mites in pecans. Parasitic wasps vary in size. Colors differ but most are brightly colored. Wasps are often seen flying in and out of the plant canopy searching for hosts Celer crab spider Photo by W. Sterling on which to lay eggs. Larvae of parasitic wasps develop within the body of the pest insect, ultimately killing the host.
Parasitic flies resemble houseflies but are somewhat hairier.
Adults may be seen resting on foliage or on flowers in which they feed. The flies lay their eggs on the skin of caterpillars. The eggs hatch and larvae eat into the caterpillar where they develop. Aphid parasites are very important in the pecan ecosystem. Pathogens occur naturally and can be a very significant factor in reducing insect populations.