Md. Code Regs. 15.06.02.12

Current through Register Vol. 51, No. 24, December 2, 2024

Section 15.06.02.12 - Classification of Plant Pests

A. Dangerously Injurious Plant Pests.

(1) A stop sale notice may be issued when any plant pest of quarantine significance is detected or is a plant pest that is not known to occur in the State.

(2) Insects. A stop-sale notice may be issued when the following insects are detected:

(a) Stem and trunk borers such as Dogwood, Ash, Lilac, Iris, Rhododendron, Lesser peach tree, Bronze birch, and peach tree;

(b) Scale insects, such as Euonymus, Elongate hemlock, Hemlock, Pit, Obscure, Japanese maple, Latania, Camellia, Oystershell, San Jose, Tea, White peach, Yangicola;

(c) Beetles, such as Whitefringed, Black vine weevil, Fullers rose beetle, White pine weevil;

(d) Caterpillars such as Gypsy moth;

(e) Gall adelgids such as Eastern spruce;

(f) Leafminers, such as Boxwood;

(3) Plant Diseases. A stop-sale notice may be issued when the following plant diseases are detected:

(a) Vascular wilt diseases, such as Dutch elm disease, Oak wilt, Verticillium wilt, Mimosa wilt, Phytophthora wilt, Elm phloem necrosis;

(b) Canker diseases, such as Chestnut blight, Nectria cankers, Botryosphaeria cankers, Cytospora cankers, White pine blister rust, Phytophthora cankers, Fusarium cankers, Strumella cankers, Volutella cankers, Phomopsis cankers, Discula anthracnose of dogwood;

(c) Bacterial diseases, such as Crown gall, Fire blight, Wetwood (Slime-flux);

(d) Galls, such as Rust galls on Pinus spp., Black knot on Prunus spp., Cedar-apple rust galls on Juniperus spp., Crown gall, Root-knot nematode;

(e) Plants infected with viruses or phytoplasms, such as Holly ringspot, Rose mosaic, Rose ring pattern, Stem pitting of Prunus, Fasciation, Witches'-broom Tospoviruses;

(f) Root diseases, such as Armillaria root rot (Shoestring root rot); Phytophthora, Pythium, Rhizoctonia, and Fusarium root rots; Damping-off; Wilts; Root-knot, cyst, and other plant parasitic nematodes;

(g) Needle blight, needle cast, and needle rust diseases of evergreens, such as Diplodia tip blight, Phomopsis blight, Brown spot needle blight, Lophodermium needle cast, Rhabdocline needle cast, Coleosporium needle rust;

(h) Gymnosporangium rusts, such as Hawthorn, and Cedar-apple;

(i) Any other disease or abnormal condition of growth determined by the Department to be dangerously injurious to plants.

(4) Weeds. A stop-sale notice may be issued when the following weeds are detected infesting the soil known as the root ball: Mugwort, Bermudagrass, Dodder, Johnsongrass, Poison ivy, Thistles, Witchweed, Mile-a-Minute, or any other weed determined by the Department to be dangerously injurious.

B. Harmful Plant Pests.

(1) Insects. A treatment order may be issued when the following insects constitute a serious threat or are causing economic damage to nursery stock:

(a) Scale insects, such as Gloomy, Putnam, Scurfey, Wax, Magnolia, Tulip trees, Peony;

(b) Caterpillars, such as Bagworm, European pine shoot moth, Nantucket pine tip moth;

(c) Lace bugs, such as Azalea, Andromeda, Hawthorn;

(d) Adelgids, such as pine bark;

(e) Leafminers, such as Holly;

(f) Mites, such as Twospotted spider, Spruce spider, Southern red;

(g) Beetles, such as Japanese, Japanese Weevil; and

(h) Aphids.

(2) Diseases. A treatment order may be issued when the following diseases or disorders constitute a serious threat or are causing economic damage to nursery stock: Foliar and flower diseases, such as Anthracnose, Powdery mildew, Leaf spots, Botrytis blight, Scab, Sooty mold, Leaf blister, Petal and flower blights, nutritional problems.

(3) Weeds. A treatment order may be issued when the following weeds are detected in a nursery or sales yard: Mugwort, Dodder, Johnsongrass, Yellow Nutsedge, Thistle, or any other weed determined by the Department to be harmful.

Md. Code Regs. 15.06.02.12

Regulations .12A amended effective February 10, 1986 (13:3 Md. R. 273)