Weed Identification and Control

A sure sign of summer, yellow nutsedge is showing up in lawn areas. More

Weed control can be accomplished chemically or mechanically. Depending on the situation, each method has its advantages and disadvantages. More

To adequately control weeds in the small-scale orchard, you should learn proper weed identification. More

Advice for collecting a good plant or insect sample for identification. More

Informational table showing pesticides available for home garden use on various fruit crops. More

Japanese knotweed (Polygonium cuspidatum) and Giant knotweed (Polygonum sachalinensis) are two invasive, exotic weeds found throughout much of the United States and Canada. More

Japanese barberry (Berberis thunbergii) was introduced from Japan around 1875. It now ranges from Nova Scotia south to North Carolina, and westward to Montana. More

Multiflora rose is a noxious, non-native shrub considered an invasive weed because of its aggressive growth habit that excludes native plants. More

Oriental bittersweet is a non-native woody, perennial vine that covers and kills native plants by blocking sunlight, weighing the plants down, and girdling stems and trunks. More

Wild grape (Vitis spp.) is a native vine found throughout Pennsylvania. There are various species of wild grape occurring in a variety of habitats. More

Tree-of-heaven (Ailanthus altissima) also known as ailanthus, Chinese sumac, and stinking sumac is a rapidly growing, deciduous tree native to a region extending from China south to Australia. More

Manage insect, mite, and disease pests in your woody ornamentals and shade trees. More

Pokeweed can be a weed in landscape beds and nurseries. More

Bull thistle (Cirsium vulgare) is a biennial that true to its name, has notable spines. This plant is much different than Canada thistle. More

Weeds are undesirable because they disrupt turf uniformity and compete with desirable grass species for moisture, light, and nutrients. More