Weeds, Diseases and Pests
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Fall armyworms are native to North America and can destroy lawn grass and other turf. They first reach Georgia in the spring or early summer, and caterpillars are noticeable in turfgrass in early July. The third, fourth, and fifth stages of fall armyworm caterpillars are the destructive stages. The younger stages (first through third larval stages) are tiny and hard to see in the grass. When infested, green turfgrass will gradually turn brown as the caterpillars grow. The damaged turfgrass may appear diseased or like it experienced drought.
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Box tree moth is an invasive pest of boxwood plants. It was introduced into New York in 2021 and has been reported in six other states. It has not been reported in Georgia yet. Boxwoods are an important ornamental evergreen shrub in the southeastern U.S., widely planted in residential, commercial, and public landscapes in both urban and suburban areas.
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The walnut caterpillar is native to North America and is mostly distributed in the eastern part of the United States. The larvae feed on the leaves of the plants such as pecan, walnut, butternut, and other species of hickory. Although it is an occasional insect pest, it feeds voraciously. This publication provides growers with information about its biology, damage symptoms, and management options.
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The Asian longhorned beetle is an invasive insect pest native to China and North and South Korea that threatens many hardwood trees in forests and landscapes in the United States. The pest is also referred to as the roundheaded borer because the segment below the head is round in shape.
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Rose rosette virus can cause major problems for nurseries, landscapers, and gardeners alike. The virus causes the plants to become undesirable and will eventually result in the death of the plant, which affects all segments of the rose industry as well as rosarians and home gardeners. The symptoms of disease on ornamental roses are a yellow mosaic pattern appearing on leaves, increased thorniness, abnormally shaped foliage and early production of lateral buds that make up the witches’ broom. This publication is intended for rose producers and serious rose gardeners interested in technical details of this virus and a mite that transmits it.
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Carpenter bees can be a serious pest on outdoor structures made of wood, such as patios, decks, siding of homes, sheds, furniture, etc. The large carpenter bee is the most common species found in Georgia. While these bees are pollinators, mated females bore tunnels into wooden structures to raise their larvae. This tunneling causes substantial damage to wood, and sometimes even compromises the integrity of the structures they affect.
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The Japanese beetle, as the name suggests, is native to Japan and was introduced to the U.S. through the transport of plant material. It is a highly devastating pest, attacking a variety of landscape and garden plants, fruit trees, field crops and turf. This circular provides an overview of Japanese beetles in the nursery and landscape, covering the biology, damage, monitoring, and management of this pest.
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Thrips are tiny, cigar-shaped insects, with about 5000 known species, many of which cause damage to cultivated plants by feeding or spreading plant diseases. It is usually difficult to identify thrips species. Although they are winged, thrips are generally weak fliers, but they can be dispersed by wind and the transport of infested plant material. Some of the common thrips affecting landscape and nursery plants are described here.
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This integrated pest management (IPM) guide for blackberry and raspberry production includes management of diseases, insects, and weeds through IPM principles. Topics include pesticide stewardship and safety, insect and disease control, pre-transplant and transplant operations, fungicides and insecticide efficacy comparisons, and spray schedules, weed management, wildlife damage, and more. Recommendations are based on information from the manufacturer’s label and performance data from research and Extension field tests. Specific rates and application methods are on the pesticide label, and these are subject to change at any time. Published in cooperation with the Southern Region Small Fruit Consortium.
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