The Larch Sawfly (Pristophora erichsonii) is an important on larch and other plants. Larch Sawfly adults typically emerge in spring […]

The Holly Leafminer (Phytomyza iliciola) is an important pest on American Holly. Overwintered Native Holly Leafminer pupae typically emerge as […]

The Locust Leafminer (Odontota dorsalis) is an important pest on Locust and several other species in many regions. Overwintered Locust […]

The Lilac Leafminer (Caloptilia syringella) is an important pest on Lilac and several other species in many regions. Overwintered Lilac […]

The Holly Leafminer (Phytomyza ilicis) is an important pest on European Holly in many regions. Overwintered Holly Leafminer pupae typically […]

The Hickory Leaf Stem Gall Aphid, or Hickory Leaf Stem Gall Phylloxera (Phylloxera caryaecaulis) is an important on hickory and […]

The Hemlock Scale (Hemiberlesia ithacae) is an important pest on Hemlock and other plants. Hemlock Scale crawlers typically emerge in […]

The Hemlock Looper (Lambdina fiscellaria) is an important on hemlock, and a few other hosts. Hemlock Looper larvae typically emerge […]

The Hemlock Rust Mite (Nalepella tsugifoliae) is an important pest on hemlock, and a few other hosts. Hemlock Rust Mites […]

Stemphylium Leaf Spot on Asparagus Stemphylium Leaf Spot, also known as Purple Spot on Asparagus, caused by the pathogenic fungus […]