• Plum rust mite

  Plum rust mites (PRM) generally restrict their feeding to new foliage, causing these leaves to brown and roll upward longitudinally

• Rose chafer

  The rose chafer is a light tan beetle with a darker brown head and long legs. It is about 12 mm long. There is one generation per year.

• American plum borer

  The adult is a light grayish brown moth with reddish brown forewings marked by wavy black and brown vertical bands about two-thirds the distance from the base.

• Apple sucker

  Adult resembles a miniature cicada, greenish yellow to yellow in color but sometimes containing reds or browns, with eyes pale green to reddish brown, and long slender antennae; wings are transparent and iridescent.

• Sour cherry yellows

  Young leaves develop chlorotic yellow rings or mottle; shot hole may occur in severe cases or as lesions age. These symptoms rarely recur after the first year of infection.

• Stigmaeid/"Yellow" mites

  Agistemus fleschneri is the principal species found in QC and northern ON orchards, while Zetzellia mali predominates in the US, southern ON and the maritime provinces.

• Peach bark beetle

  Adult's body is brown with many punctures, from which arise yellowish hairs. The larva is a small, legless grub.

• Buffalo treehopper

  The pale green adult exhibits a large thorax with two "horns" and a long posterior wedge-shaped body. The cream-colored eggs are laid in a groove on the tree bark, where they overwinter.

• Dock sawfly

  The adult is bluish black with red legs. The larva is a smooth velvety green worm with white legs and a dark head.

• Bacterial canker (blossom blast)

  Leaf scars, stomata, and areas of injury are the principal sites of infection. The most conspicuous symptoms are limb and trunk cankers, blossom blast, "dead bud", and leaf spotting; these symptoms may or may not occur together.

• Oystershell scale

  The adult female remains immobile under a small brown scale in the shape of an oyster shell attached to the bark of branches. The white and oval eggs are laid inside the scale and crawlers emerge in the spring during the petal fall stage of apple.

• Alternaria fruit rot

  The disease appears as velvety dark green to black, circular, sunken lesions on mature fruit; the infected tissue is firm and brown. Disease is typically associated with over-ripe or damaged fruit, or fruit held in storage.

• Spiders: Foliage Hunters

  The body of a spider is divided into two regions, the cephalothorax and abdomen. The cephalothorax bears the eyes (various numbers and arrangements), mouthparts, pedipalps and legs (four pairs), and the unsegmented abdomen bears the genital structures, spiracles, anus and spinnerets (silk-spinning structures).

• Verticillium wilt

  Leaves wilted or browned on one or several branches, often remaining attached; the rest of the tree appears healthy. Young trees are often killed by infection.

• Stink bugs

  The adult has an oval shield-shaped body, grayish or brownish in color; a spur is present on each side of its thorax. Eggs, grouped in masses of 20 to 30, are in the shape of small barrels. They are gray, cream or gold-colored, decorated by a ring of small hairs.

• San Jose scale

  Adult males are minute, winged insects about 1 mm long and golden brown with a reddish tinge. Scales may be either disk-shaped or oval, and are composed of concentric rings of gray-brown wax radiating from a tiny white knob.

• American brown rot

  American brown rot is common on apricot, peach, nectarine, plum and cherry.

• European brown rot

  Monilinia laxa is a plant pathogen that is the causal agent of brown rot of stone fruits.

• European red mite

  Adult female European red mites are less than 0.5 mm and dark red with eight legs. Adult males are smaller than the females and have a pointed abdomen. Males are usually dull green to brown.

• Green pug

  The adult is a grayish moth with mottled or scalloped dark striations toward the wing margins. The larva is a green inchworm with a dark head and a dark reddish brown dorsal mid-line present in later instars.