Aphid

Heavily-infested leaves can wilt or turn yellow because of excessive sap removal. Aphids may transmit viruses between plants and also attract other insects that prey on them such as ladybugs.

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Aphids can be various colors including yellow and produce a sticky honeydew substance.

. They can migrate great distances mainly through passive dispersal by winds. Aphids may transmit viruses from plant to plant on certain vegetable and ornamental plants. AphID includes all 38 aphid species in the dichotomous keys to polyphagous aphids in the three seminal works by Roger Blackman Victor Eastop 1994 2000 2006.

The remaining aphids represent the 28 species most frequently intercepted at United States ports of entry that are not already represented on the Blackman Eastop list. Aphids are soft-bodied insects that use their piercing sucking mouthparts to feed on plant sap. Aphids are distributed worldwide but are most common in temperate zonesIn contrast to many taxa aphid species diversity is much lower in the tropics than in the temperate zones.

Plant these in the areas of your garden where aphids have been a problem. Aphids feed on a wide range of plants and in severe cases the plant fails to thrive. The viruses mottle yellow or curl leaves and stunt plant growth.

In addition you can grow plants that attract aphids like calendula and nasturtium on the opposite side of your property. They usually occur in colonies on the undersides of tender terminal growth. Aphids are small 116- to 18-inch-long 2-4 mm pear-shaped soft-bodied insects.

You can also plant some aphid favorites as trap plants to lure aphids away from plants you are trying to protect. Aphid family Aphididae also called plant louse greenfly or ant cow any of a group of sap-sucking soft-bodied insects order Homoptera that are about the size of a pinhead most species of which have a pair of tubelike projections cornicles on the abdomen. Mature aphids can be wingless or can have wings.

Adult and nymph aphids. How to identify aphids. Image by yongxin zhang.

Winged aphids may also rise up in the day as high as 600 m where they are transported by strong winds. Some aphid species cause galls to form on roots or leaves. A few species cause gall formations.

They can range in color from green black red yellow brown or gray. Clover mint dill fennel and yarrow. University of Kentucky College of Agriculture.

Yellowing and distorted leaves stunted growth and an unsightly black and sticky substance on the plant may mean that you have aphids. Winged aphids are similar in color but are a little darker. Catnip garlic chives onion and allium.

Also keep your garden clean of dead plant material that may be harboring aphid eggs over winter. Some aphid species inject a toxin into plants which causes leaves to curl and further distorts growth.

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