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"Some Consequences of Using the Horsfall-Barratt Scale for Hypothesis Testing". Phytopathology. 100 (10). American Phytopathological Society: 1030– 1041. doi: 10.1094/phyto-08-09-0220. ISSN 0031-949X. PMID 20839938
Plant diseases are diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). [1] Organisms that cause infectious disease include fungi , oomycetes , bacteria , viruses , viroids , virus -like organisms, phytoplasmas , protozoa , nematodes and parasitic plants . [ 2 ]
Pages in category "Plant disease scales" This category contains only the following page. This list may not reflect recent changes. H. Horsfall–Barratt scale
Plant disease scales (1 C, 1 P) Pages in category "Plant diseases" The following 8 pages are in this category, out of 8 total.
The scale's activities can result in stress for the plant, causing reduced growth and giving it a greater susceptibility to plant diseases. [12] Mutualistic Formica fusca ants tending a herd of mealybugs. Scale insects in the genus Cryptostigma live inside the nests of neotropical ant species. [13]
Powdery mildew is a fungal disease that affects a wide range of plants. Powdery mildew diseases are caused by many different species of ascomycete fungi in the order Erysiphales . Powdery mildew is one of the easier plant diseases to identify, as the signs of the causal pathogen are quite distinctive.
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Using formulations of neem oil, which is an organic broad spectrum pesticide, insecticide, fungicide and miticide controls mites and insects such as whitefly, aphid, scale, and mealy bugs, and additional fungus diseases like black spot, rust, mildew, and scab. Neem oil can be used on house plants, flowers, vegetables, trees, shrubs and fruit ...