After the cold, dark weather of winter, we are all looking forward to spring! Flowers will be blooming. The birds will be singing. And while spring brings new life to
- Blog Category:
Pests and Diseases
Brood X is on its way. This is one of the largest broods of periodical cicadas, and the insects will soon be seen in a number of states including Delaware,
Sometimes when a non-native species is introduced to a new environment there is a devastating result. Whether the invasive species is a plant, animal, or pathogen, the presence of these
Everyone is outside these days, taking long walks in the park or on hiking trails and creating new spaces in their own backyards. It’s amazing to see people embracing the
Be on the lookout for bagworm bags on juniper, arborvitae, spruce, pine, cedar and lots of other conifers and deciduous plants. Bagworm is a moth, which in its larval stage,
Lots of scale insects are active during the heat of summer, but some of these tiny pests are just now beginning to hatch and will continue causing tree and shrub
Oak is one of the most common tree species in the northern hemisphere. Often seen as a symbol of strength and wisdom, oaks are well-known for their longevity and adaptability.
Aphids are small, sap-sucking insects. Some of them feed on more than one type of plant— for example, apple grass aphids feed on young new leaves and blossoms of apples
Oystershell scale (Lepidosaphes ulmi) belongs to a group of insects called the armored scales. The “armor,” is produced by a waxy secretion combined with the insect’s own body cast during
Over the past decade, spruce trees have suffered an abundance of issues. All species of spruce, including Colorado blue and white spruce, are being affected, but particularly concerning is the
Boxwood blight is caused by the non-native fungus Calonectria pseudonaviculata. American and English boxwood (Buxus sempervirens) are most susceptible to this disease whereas many Asian species of boxwood, and hybrids
Pear trellis rust is caused by the fungus Gymnosporangium sabinae. It was introduced into the United States from Europe in the 1990s and has been progressively spreading through states in
Adult sawflies are often similar in appearance to flies or wasps. The larvae are also similar, though sawflies have one simple eye on each side of the head and five
Bacterial leaf scorch (BLS) is caused by the bacterium Xylella fastidiosa. This disease impacts certain shade trees resulting in uneven ‘scorching’ of leaf margins in late summer and early fall.
Two common causes of root disease in California are species of the fungus Armillaria and species of Phytophthora, which are fungus-like organisms. There are many differences between the two pathogens,