This is commonly due to the weakened state of the larvae as low level starvation begins and is enhanced by the constant contact of the larvae with each other. Cool, wet spring weather also plays a role be slowing down the development rate of the insects while making disease transmission easier. A stingless wasp, Itoplectis conquisitor, is another important parasitoid of FTC pupae. Management Since FTC has such a wide host range, silvicultural options are severely limited. Forestry practices such as thinning and pruning are not used in FTC management.
Silvicultural actions are limited to planting non-host species such as red maple or conifers.
In general, management options are limited to the acceptance of the growth loss and nuisance or to the use of insecticide treatments. Insecticide Treatments Forest tent caterpillar rarely causes severe damage to trees and, as a result, the forest does not normally need the protection of pesticides. Natural control systems cause the collapse of populations resulting in cyclical outbreaks. Private landowners may desire or justify spraying in order to protect the leaves and preserve aesthetics. In making this decision the landowners should consider their goals, environmental concerns and their ability to pay.