You can identify the larval stage of the redheaded pine sawfly by its bright red head. When present on seedlings, the insects feed in colonies which literally cover the stem. They prefer the outer portion of the needles but will consume the entire needle when their numbers are high enough. Pine with an infestation of red headed pine sawfly. Like other insect pests, the redheaded pine sawfly is usually kept in check by unfavorable environmental factors including high moisture levels.
Temperature extremes delay larval development.
Natural control factors such as nuclear polyhedrosis virus disease, bird and rodent predation, and wasp parasitism keep the redheaded pine sawfly in check as well. More serious infestations can be managed using the proper insecticide. Summary This publication will provide you with some help identifying and controlling an insect or disease on your property. Often, if the problem is not serious, you can avoid the use of chemicals by making sure that your trees are well taken care of. If minor infestations do occur, several of these diseases and insects can be controlled through physical removal of the affected plant parts or of the insect.