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The spruce spider mite attacks spruce, arborvitae, juniper, hemlock, pine, Douglas-fir, and occasionally other conifers.

Powderpost beetles breed in dead and dried hardwoods. Their presence may be overlooked until they are discovered in stored lumber, rafters, joists, floors, and furniture.

Get the answers to the most frequently asked questions about spotted lanternfly, including their damage to plants, how to manage them on your property, and what you can do to help!

Untested homemade solutions may harm people, pets, and plants. Their use can be unsafe and illegal.

Shortly after planting, apply 8 ounces of 10-10-10 per plant.

Nutritional requirements of apple trees are best determined by nutritional analysis and observations of tree growth.

Nectria twig blight, caused by the fungus Nectria cinnabarina, is a minor disease that breaks out occasionally.

Leaf blight and fruit spot are caused by the fungus Fabraea maculata, which infects the leaves, fruit, and shoots of pear and quince and the leaves of apple trees.

Watering the young tree in late June might be desirable, depending on the rainfall up to that time.

This schedule will not provide desirable control of brown rot unless there is Captan in the GPProduct mix.

Informational table showing apple varieties that are non-resistant to apple scab but recommended for home planting in Pennsylvania.

Supplement for green industry professionals and natural resource managers on the spotted lanternfly and effective management strategies.

Next growing season, why not use some natural pest management? Any landscape, nursery, or greenhouse can contain a large number of beneficial insects and arachnids.

Information about locating, identifying, and treating egg masses.

Learn to identify native trees and shrubs using bark, buds, and seeds during a guided walk focused on seed collection, conservation, and community stewardship.

Spring has sprung and while the change is welcome, it is often when problems emerge that gained a foothold last year.

The birch skeletonizer, Bucculatrix canadensisella, is a native North American moth. The caterpillars skeletonize the leaves of birch trees.

The armored obscure scale is a key pest of oak in Pennsylvania, and can attack other woody host plants such as beech, dogwood, hickory, maple, and willow.

The most common host plants of Cooley spruce gall adelgid are Colorado blue spruce and Douglas-fir that are grown as landscape ornamentals and Christmas trees.

The old house borer is an injurious wood-boring insect. The larva bores through pine, spruce, and other coniferous woods, weakening structural timbers.

Learn holly propagation, selection, and landscape use, including integrating native plants and steps to become a Certified Holly Arboretum.

The fall cankerworm is a native pest of hardwood trees in North America. It causes some defoliation in the forest every year, with larger outbreaks occasionally.

The tuliptree scale is a pest of yellow poplar, or tuliptree, magnolia, and linden. This soft scale insect is so prolific that it can cover twigs and branches.

Several varieties of currants and gooseberries are available and described below. Only varieties of black currants with good resistance to white pink blister rust are included.

Phomopsis twig blight and canker is a very common fungal disease in plantings. In addition to causing a twig blight and cankers, the fungus also causes leaf spots and a fruit rot.