Plant Distress Signals from Home HarvestŪ
- Plant Distress Signals:Too Little Water, Too Much Water, Too Little Humidity, Too Little Humidity, Temperatures Too Cool, Temperatures Too Warm, Liquid Temperatures, Light Deficit, Light Excess, Fertilizer Deficit, Fertilizer Excess, pH Factor
KEYWORDS: Leaf tips on newer growth brown or burn, older foliage leaves turns yellow, burn and fall prematurely, signs of trouble, yellowing, turning pale green, Few side branches develop, older leaves turn yellow, dry and drop, Leaves curling appear pale, edged with red, sunburn, bleaching leaves tissues, damaged, Reduced size, increased internode length, changes in stem orientation, loss of old leaves, permanently marked with colorless sections, Flowers production slows, flowering, rapid loss of the oldest foliage and a paling of the surviving foliage, turn purple, roots begin to develop on above-ground stems, Few flower buds mature into functioning flowers. foliage losing loses its color, collapse and decomposing, plant not forming leaves. Turn yellow, smaller than normal, crinkly, crinkled at the edges, margins, wiry, plant shrinks in size. leaf drop, leaves dropping, severe leaf shrinkage, cease forming new leaves, recently formed leaves turn dark green, with the margins turning tan and cracking, lower leaves wilt, die, death, sick, stems become dark and mushy, rot, rotting, algae, mosses and ferns develop on the surfaces of the growing medium and container, rot, foliage may wilt, and brown leaf tips may develop. Lower leaves turn yellow and fall off. deterioration of the fine root system -
( Added: 27-Mar-2002 Hits: 323)
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Plants as Vectors
- In 2001, more longhorned beetles were found in the Seattle area on imported maple trees from Korea. -
( Added: 19-Jan-2002 Hits: 101)
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Powdery Mildew of Ornamental Plants
- Powdery mildew fungi attack a variety of ornamental plants grown in Virginia. Photinia, crape myrtle, dogwood, lilac, Japanese euonymus, wintercreeper euonymus, and many crabapple cultivars are highly susceptible and can be seriously damaged by powdery mildew infection. Many herbaceous ornamental plants are also susceptible to powdery mildew.
Powdery mildew, causes and treatment. -
( Added: 1-Jul-2002 Hits: 182)
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Root Rot of Azaleas and Rhododendrons
- Root rot is a serious disease affecting azaleas and rhododendrons. The fungus Phytophthora cinnamomi is often associated with root rot, although other fungi may also be involved. Phytophthora cinnamomi survives as thick-walled spores in infected roots, lower stems, plant debris, and in the soil. The fungus can persist for many years, but it does not overwinter well in the northern United States in the soil alone. During cool, wet weather, the fungus produces mobile spores, which can swim short distances. Spores are also transported to nearby roots by water movement through the soil. KEYWORDS AZALEA SATSUKI ROTTING ROOTS ROTTED -
( Added: 10-Jun-2002 Hits: 104)
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Scale Insects
- These are of two general groups, the soft scales and the hard scales. The soft scales are usually half round, rubbery and about 1/8 inch long. The hard scales vary in shape and have a shield-like covering. Scale insects are less than 1/4 inch long and vary in color. They may be found on any part of the plant. The young are referred to as "crawlers" and are active only a short time after birth when they infest the new growth. As a result of their feeding, large amounts of honeydew are excreted. On this sticky excretion a sooty mold develops, giving the stems or foliage a blackened appearance. Severe infestations, besides making the plant unattractive, will weaken it considerably even to the point of death. Soft scale is more prevalent in the south affecting such plants as citrus, gardenias, hollies and camellias. The most important hard scale attacking outdoor plants are the San Jose, oyster shell, euonymus and rose scale. -
( Added: 24-May-2002 Hits: 147)
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Spider Mites!
- Spider mites are the bane of bonsai growers and growers of ornamentals in gerneral... KEYWORDS red spider mites, integrated pest management, IPM, webbing, boxwood, buxus, miticide, insecticide, insecticidal soaps, orthene, kelthane, isotox, spotted mites, predator mites, -
( Added: 4-Jan-2002 Hits: 204)
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TATŪ Insecticides
- Walco-Link has provided TATŪ Insecticides for nearly 75 years. KEYWORDS: Pesticides -
( Added: 16-Jan-2003 Hits: 65)
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The Bonsai Primer: Pests and Diseases
- Insects, Chemicals, Malathion, Red Spider Mites, webs, Fungus, Fungii, Fungicides, Scab, Cats, Pests, Bugs -
( Added: 11-Jan-2002 Hits: 234)
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The Causes of Bark Splitting on Trees
- Bark splitting can occur in response to various environmental factors at different times of the year. Splits can occur on the trunk of the tree as well as on branches. Trees which are most susceptible to this type of injury are those with thin bark, such as certain fruit trees. Newly planted trees or young trees are more prone to bark-splitting. Bark splits are not likely to be fatal to trees, although they will, in some cases, allow entry of disease organisms which can cause decay. -
( Added: 16-Mar-2002 Hits: 102)
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Using Fungicides to Control Bonsai Diseases
- Using Fungicides to Control Bonsai Diseases KEYWORDS: Nina Shishkoff, pesticides, safe and effective, fungicides, SYSTEMIC fungicide, protectant, water molds, rotting, SOIL DRENCH, leaf spots, Triadimefon, Chlorothalonil, Benomyl, Mancozeb, Propiconazole, powdery mildews, Triadimefon, rusts, Mancozeb, Chlorothalonil, Propiconazole, Phytophthora, Pythium, Fosetyl-A1, Metalaxyl, thiophanate methyl, Captan -
( Added: 3-Jan-2002 Hits: 185)
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Verticillium Wilt
- PDF file requires adobe PDF reader. Verticillium wilt, a disease of a plant's vascular system... caused by a fungus that invades plant roots and plugs the water conducting tissues which prevents water from reaching the leaves. Symptoms vary but include: Leaf wilt, drop, yellowing -
( Added: 3-Aug-2002 Hits: 116)
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Wood Decay
- Wood decay is a common occurrence among all kinds of trees. Decay can affect the roots, sapwood, or heartwood of a tree. The results may be seen in dying trees or in trees which have smaller leaves and slower growth. KEYWORDS: COMPARTMENTALIZATION FUNGUS FUNGI MUSHROOMS -
( Added: 10-Jun-2002 Hits: 285)
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Woolly Aphids on Trees and Shrubs
- Woolly aphids (family Eriosomatidae) occur on many hardwood and coniferous tree and shrub species in Minnesota, including elm, silver maple, ash, alder, apple, pear, pine, spruce, hawthorn, and juneberry (Amelanchier). They are small (2-4 mm [1/8 inch] in length), pear shaped insects, and are often covered with white waxy strands. The wax filaments give this pest a fluffy, cottony appearance, as though they are covered with wool. Woolly aphids are similar to true aphids KEYWORDS: Aphis, Pine Bark Adelgid: -
( Added: 10-Jun-2002 Hits: 118)
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