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Fruit & Nuts

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Showing results for content tagged 'apples'. Search instead for the keyword 'apples'.

  • Apples

    With more than 900 million pounds of apples produced per year, apples are Michigan's largest fruit crop. MSU Extension offers a variety of programming to assist farmers in orchard management and tree growth.


  • Pearleaf blister mite

    The adults are very small and cannot be seen without a 15X hand lens; the body is white and elongate oval in shape, like a tiny sausage.

  • Mullein plant bug

    Adult is grayish green with black spots on the legs. The nymph resembles an apple aphid or a white apple leafhopper and is solitary, very mobile and lacks cornicles.

  • Silver leaf

    Silvering of the foliage is the characteristic symptom. At first, silvering may be associated with only one or two major branches, but eventually the entire tree becomes silvery in appearance. When infection is severe the leaves may curl upward.

  • Quince rust

    Attacks only the fruit of apple and pear. Symptoms begin as a purplish lesion, usually appearing on the calyx end of the fruit. As the disease progresses, the entire calyx end becomes blistered and deformed. Tube-like structures eventually form and produce powdery, bright orange spores.

  • Snowy tree cricket

    Adult somewhat resembles a field cricket, but is pale green in color and has a longer, more slender body and smaller head. Antennae are much longer than the body; males have stiff veins in their flat wings.

  • Black cherry aphid

    Adults and nymphs are shiny black soft-bodied insects; adults may or may not have wings. Nymphs are smaller, but generally similar in appearance to the adults.

  • Dry eye rot (blossom end rot)

    Symptoms begin at the calyx end of the fruit, causing a reddish discoloration at the site of infection. The rot is at first soft, but eventually dries out, turning tan to brown with a red border.

  • White peach scale

    Adult female is creamy-white to reddish orange, and covered by a round waxy scale that is grayish to brownish white. Adult males are tiny yellow 2-winged insects, and nymphs are oval and white to orange.

  • Nectria twig blight

    Typically, small cankers can be found girdling the base of cluster buds that bore fruit the previous year. This leads to the wilting and dying of leaves and twigs of current season's growth.

  • Leafhoppers, about

    Potato leafhopper (PLH) can be differentiated from white apple leafhopper by color and by observing movement and feeding habits.

  • Armillaria root rot

    The bark at the crown and roots sloughs off easily, exposing the dense white growth of the fungus. The growth extends in a fan-like pattern underneath the bark. Black shoestring-like strands may be obvious on the surface of the bark.

  • Skeletonizers

    The adults of the skeletonizers are brown and short, with transverse bands on each forewing. The larvae are yellow to pale green with numerous hairy discs on each segment of the body.

  • Black peach aphid

    These smooth-looking, pear-shaped insects have long antennae and a pair of cornicles extending from the posterior end of the body.

  • Flyspeck

    Sooty blotch and flyspeck are found together on the same fruit and affect only the epidermal layer of the fruit. Flyspeck colonies appear as distinct groupings of shiny, black fungal bodies on the surface of the fruit.

  • Replant disorders

    In general, trees suffering from replant disease show slow and uneven growth within the first three years of planting. Both specific and non-specific replant disorders are known.

  • Cherry fruitworm

    The adult is a small, brownish gray moth with a median gray band on the forewings and a dark spot at the base of the hind wings. Although whitish gray with a black head when young, the larva eventually becomes pink tinted, with a brownish tan head.

  • Codling moth

    The adult's forewings are striped with fine brown-gray lines and a distinctive bronze to brown-black oval spot at the tip. Eggs are laid on the leaves or fruit.

  • European corn borer

    Adult is a pale yellowish brown moth with irregular darker bands running in wavy lines across wings male is distinctly darker than the female.

  • Lesser appleworm

    The adult is a small gray moth with distinct small orange bands or patches on the wings; some blue is also evident in newly emerged specimens.

  • Eastern tent caterpillar

    The adult is reddish brown with two white, transverse-parallel bands. Masses of shiny black eggs are laid in a ring around twigs. Larvae have long silky hairs on their body and a yellow line on their back.