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    Protect Your Landscape from Insect Pests

    Insect pests cause significant damage to gardens and landscapes. In our service area on Chicago’s North Shore and Southeastern Wisconsin, we see the evidence of this every day. Although not all insects are harmful, the damage potential from insect pests can be huge. In fact, insects cause more damage to your garden than any other type of pest.

    Once established, the cost to get rid of insect pests can be significant. The resulting damage can ruin the appearance of your home landscape. So, be proactive! Keep a close eye on your plants and trees to prevent an infestation – look for signs of damage and disease. Plants that are stressed due to drought are especially susceptible to damage. Also, their growth can be adversely affected.

    Insects can harm any part of a plant and at any stage of its development. In serious cases, pests may even kill plants. Sucking insects may transmit disease from infected plants to healthy plants. Even trees can be subject to harm and complete loss, due to insect pests. For example, the emerald ash borer has done significant damage in our area. The beetle has contributed to tree loss by eating the tissue under the tree bark.

    Be vigilant in checking plants and taking action before things get out of control. Early detection and treatment can be the difference between saving and losing a prize specimen. Keep in mind that effective treatments, such as chemical insect sprays, may also harm or kill beneficial insects. To avoid this, it’s a good idea take advantage of expert resources:

    • Contact Chicago Botanic Garden’s Plant Information Service for helpful information and advice.
    • Invest in a bug ID book or visit the website links below to see photos and learn about insect pests.
    • Call us at Van Zelst for help in identifying and treating your garden for insect pests: 847-243-6587.


    Get to Know these 3 Insect Pests 

    The number of pest species is large! Become familiar with our top 3 insect pests, so you can identify them and protect your plants from damage.

    Two-spotted spider mite

    Latin Name: Tetranychus urticae
    Description: Small, tiny, wingless creature that is difficult to see without a hand lens or magnifying glass
    Where they live: Undersides of leaves
    Plants affected: Annuals, perennials, trees, and shrubs
    Harm to the plant: Sucks the fluid from the leaves which creates small dots or specks – also creates a fine network of webs that cover stems and leaves
    Discouraging damage: Keep plants well-watered – Chemical control only as last result

    Spider Mites crawling on webs (Photo credit: R. Lopez).


    Japanese Beetles

    Latin Name: Popillia japonica
    Description: Metallic green insects that emerge in July and feed for 4-6 weeks
    Where they live: On plants, grubs live in grass
    Plants affected: Over 300 types of plants
    Harm to the plant: Chew on plants leaves and flower tissue, can create extensive damage and leaves will fall from the plants, grubs feed on the roots of grass causing brown patches
    Discouraging damage: Hand pick the beetles or knock them into a bucket of soapy water – best to do this in the early morning

    Japanese Beetle.



    Latin Name: Aphidoidea
    Description: Small, soft-bodied insect – reproduces many times a year – easy to spot in clusters, usually wingless
    Where they live: On plants
    Plants affected: New succulent shoots, buds and leaves, perennials, annuals, shrubs, trees, vegetables
    Harm to the plant: Leaves and stems can become yellow, distorted or curled – produce honeydew secretion which can cause growth of sooty mold (a harmless black fungus)
    Discouraging damage: Spray plant with water to knock them off – insecticidal soap can be used with caution




    Helpful Resources about Insect Pests


    Van Zelst, Inc.
    Bugs and Garden Thugs

    Illinois Department of Agriculture
    Insect Pests

    University of Illinois Extension
    Insect Control

    Chicago Botanic Garden
    Garden Pests & Problems
    Insect Pests: Is Something Bugging Your Garden?

    Morton Arboretum
    Help with Pests

    Identify Insect Pests and Protect Your Landscape

    Insect pests cause significant damage to gardens and landscapes in our area. Be proactive – learn about insect pests, monitor your garden for unwanted visitors, and take action to prevent infestation and damage to your special landscape.

    Call the experts at Van Zelst for information and assistance with insect pests: 847-243-6587.

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