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Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
Plant disease. 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]
List of carnation diseases. List of carrot diseases. List of cassava diseases. List of cattleya diseases. List of chickpea diseases. List of cineraria diseases. List of citrus diseases. List of coconut palm diseases. List of coffee diseases.
Plant disease triangle. Epidemiology is the study of factors affecting the outbreak and spread of infectious diseases. [10] A disease triangle describes the basic factors required for plant diseases. These are the host plant, the pathogen, and the environment. Any one of these can be modified to control a disease. [11]
List of cacao diseases. List of foliage plant diseases (Cactaceae) List of caneberries diseases. List of canola diseases. List of carnation diseases. List of carrot diseases. List of cassava diseases. List of cattleya diseases. List of chickpea diseases.
Physiological plant disorders are caused by non- pathological conditions such as poor light, adverse weather, water-logging, phytotoxic compounds or a lack of nutrients, and affect the functioning of the plant system. Physiological disorders are distinguished from plant diseases caused by pathogens, such as a virus or fungus. [ 1]
Many species of cactus have long, sharp spines, like this Opuntia. A cactus (pl.: cacti, cactuses, or less commonly, cactus) [3] is a member of the plant family Cactaceae (/ kækˈteɪsi.iː, - ˌaɪ /), [a] a family comprising about 127 genera with some 1,750 known species of the order Caryophyllales. [4] The word cactus derives, through Latin ...
Prognosis. Good with treatment, poor if widespread disease [1] Sporotrichosis, also known as rose handler's disease, [2] is a fungal infection that may be localised to skin, lungs, bone and joint, or become systemic. [2][4] It presents with firm painless nodules that later ulcerate. [3]