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Alternaria Mali
''Alternaria mali'', also called alternaria blotch of apple, is a pathogenic fungus affecting plants. It is prevalent in the southern United States and elsewhere, and damages the leaves of infected apple trees. Pathogenesis ''Aleternaria mali'' can overwinter as mycelium on dead leaves on the ground, in mechanical injuries in twigs, or in dormant buds. Primary infection occurs about one month after petal fall the following year. The disease is favoured by temperatures between 77 and 86 °F (25–30 °C), and by wet conditions. Infection occurs at optimum temperatures with 5.5 hours of wetting, and an outbreak can become serious within two days of infection. The fungus attacks susceptible cultivars using a chemical toxin. Affected plants exhibit circular spots on the leaves that enlarge as the disease advances. Normally, hyphae cannot adhere to the surface of the host, but under moist conditions light-grey mycelium might be present on the surface. Normally the fungus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pathogenic Fungi
Pathogenic fungi are fungi that cause disease in humans or other organisms. Approximately 300 fungi are known to be pathogenic to humans. Markedly more fungi are known to be pathogenic to plant life than those of the animal kingdom. The study of fungi pathogenic to humans is called "medical mycology". Although fungi are eukaryotic, many pathogenic fungi are microorganisms. The study of fungi and other organisms pathogenic to plants is called plant pathology. ''Candida'' ''Candida'' species cause infections in individuals with deficient immune systems. Th1-type cell-mediated immunity (CMI) is required for clearance of a fungal infection. ''Candida albicans'' is a kind of diploid yeast that commonly occurs among the human gut microflora. ''C. albicans'' is an opportunistic pathogen in humans. Abnormal over-growth of this fungus can occur, particularly in immunocompromised individuals. ''C. albicans'' has a parasexual cycle that appears to be stimulated by environmental stress. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mutsu (apple)
The apple (also known as Crispin) was introduced in 1949 and is a cross between the ' Golden Delicious' and the 'Indo' apple cultivars first grown in Aomori Prefecture, Japan. The apple's name is the former name of a large section of the Tōhoku region, Mutsu Province, which Aomori was created from during the Meiji Restoration.Crispin apple 'Mutsu' is a cultivar. /ref> It is highly susceptible to the disease Blis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alternaria
''Alternaria'' is a genus of Deuteromycetes fungi. All species are known as major plant pathogens. They are also common allergens in humans, growing indoors and causing hay fever or hypersensitivity reactions that sometimes lead to asthma. They are present in the human mycobiome and readily cause opportunistic infections in immunocompromised people such as AIDS patients. There are 299 species in the genus; they are ubiquitous in the environment and are a natural part of fungal flora almost everywhere. They are normal agents of decay and decomposition. The spores are airborne and found in the soil and water, as well as indoors and on objects. The club-shaped spores are single or form long chains. They can grow thick colonies which are usually green, black, or gray. At least 20% of agricultural spoilage is caused by ''Alternaria'' species, with the most severe losses reaching 80% of yield. Many human health disorders can be caused by these fungi, which grow on skin and mucous me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mite
Mites are small arachnids (eight-legged arthropods). Mites span two large orders of arachnids, the Acariformes and the Parasitiformes, which were historically grouped together in the subclass Acari, but genetic analysis does not show clear evidence of a close relationship. Most mites are tiny, less than in length, and have a simple, unsegmented body plan. The small size of most species makes them easily overlooked; some species live in water, many live in soil as decomposers, others live on plants, sometimes creating galls, while others again are Predation, predators or Parasitism, parasites. This last type includes the commercially destructive ''Varroa'' parasite of honey bees, as well as scabies mites of humans. Most species are harmless to humans, but a few are associated with allergies or may transmit diseases. The scientific discipline devoted to the study of mites is called acarology. Evolution and taxonomy The mites are not a defined taxon, but is used for two disti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Captan
Captan is a general use pesticide (GUP) that belongs to the phthalimide class of fungicides. It is a white solid, although commercial samples appear yellow or brownish. Applications Although it can be applied on its own, Captan is often added as a component of other pesticide mixtures. It is used to control diseases on a number of fruits and vegetables as well as ornamental plants. It also improves the outward appearance of many fruits, making them brighter and healthier-looking. Captan is utilized by both home and agricultural growers and is often applied during apple production. It is also active against certain oomycetes, such as Pythium, making it useful for controlling damping off. Biodegradation The compound biodegrades with halflife of less than 1 day in soil. Potential health effects Captan was previously cited as Group B2, a probable human carcinogen by the US Environmental Protection Agency (EPA), but was reclassified in 2004. Since the mode of action has been esta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mancozeb
Mancozeb is a dithiocarbamate non-systemic agricultural fungicide with multi-site, protective action on contact. It is a combination of two other dithiocarbamates: maneb and zineb. The mixture controls many fungal diseases in a wide range of field crops, fruits, nuts, vegetables, and ornamentals. It is marketed as Penncozeb, Trimanoc, Vondozeb, Dithane, Manzeb, Nemispot, and Manzane. In Canada, a mixture of zoxamide and mancozeb was registered for control of the mildew named Gavel as early as 2008. Mechanism Mancozeb reacts with, and inactivates, the sulfhydryl groups of amino acids and enzymes within fungal cells, resulting in disruption of lipid metabolism, respiration, and production of adenosine triphosphate. Mancozeb is listed under FRAC code M:03 The "M:" refers to Chemicals with Multi-Site Activity. "M:" FRAC groups are defined as generally considered as a low risk group without any signs of resistance developing to the fungicides. Toxicology A major toxicological conc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iprodione
Iprodione is a hydantoin fungicide and nematicide. Application Iprodione is used on crops affected by Botrytis bunch rot, Monilinia fructicola, Brown rot, Sclerotinia and other fungal diseases in plants. It is currently applied in a variety of crops: fruit, vegetables, ornamental trees and shrubs and on lawns. It is a contact fungicide that inhibits the germination of fungal spores and it blocks the growth of the fungal mycelium. It has been marketed under the brand name "Rovral" and "Chipco green" (both brands of Bayer CropScience). This chemical was developed originally by Rhône-Poulenc Agrochimie (later Aventis CropScience and in 2002 acquired by Bayer). As of 2004 there were no composition patents on iprodione. DevGen, DevGen NV (Now part of Syngenta) discovered that iprodione kills nematodes and filed for patent protection for those uses. Iprodione was approved in the Turkish market under the brand name Devguard for use on tomatoes and cucumbers in 2009, and was approve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungicide
Fungicides are biocidal chemical compounds or biological organisms used to kill parasitic fungi or their spores. A fungistatic inhibits their growth. Fungi can cause serious damage in agriculture, resulting in critical losses of yield, quality, and profit. Fungicides are used both in agriculture and to fight fungal infections in animals. Chemicals used to control oomycetes, which are not fungi, are also referred to as fungicides, as oomycetes use the same mechanisms as fungi to infect plants. Fungicides can either be contact, translaminar or systemic. Contact fungicides are not taken up into the plant tissue and protect only the plant where the spray is deposited. Translaminar fungicides redistribute the fungicide from the upper, sprayed leaf surface to the lower, unsprayed surface. Systemic fungicides are taken up and redistributed through the xylem vessels. Few fungicides move to all parts of a plant. Some are locally systemic, and some move upwardly. Most fungicides that can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jonathan (apple)
The Jonathan apple is a medium-sized sweet apple, with a touch of acid and a tough but smooth skin. It is closely related to the Esopus Spitzenburg apple, good for eating fresh and for cooking. Sugar 14%, acid 9g/litre, vitamin C 5mg/100g. History There are two alternative theories about the origin of the Jonathan apple. The first is that it was grown by Rachel Negus Higley. Mrs. Higley gathered seeds from the local cider mill in Connecticut before the family made their journey to the wilds of Ohio in 1796 where she planted them. She continued to carefully cultivate her orchard to maturity and named the resulting variety after a young local boy that frequented her orchard: Jonathan Lash. The other, and more accepted, theory is that it originated from an Esopus Spitzenburg seedling in 1826 from the farm of Philip Rick(s) in Woodstock, Ulster County, New York. Although it may have originally been called the "Ricks" apple, it was soon renamed by Judge Buel, President of Albany Hor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jonagold
Jonagold is a cultivar of apple which was developed in 1953 in New York State Agricultural Experiment Station of Cornell University's College of Agriculture and Life Sciences, a cross between the crisp Golden Delicious and the blush-crimson Jonathan; the name ''Jonagold'' is a portmanteau of these two variety names. They form a large sweet fruit with a thin skin. Because of their large size they are now favoured by commercial growers in many parts of the world. Jonagold is triploid, with sterile pollen, and as such, requires a second type of apple for pollen and is incapable of pollenizing other cultivars. The Jonagored Apple, a sport mutation of Jonagold, was once covered under United States Patent PP05937, now expired. Jonagold has a green-yellow basic color with crimson, brindled covering colour. The apple has a fluffily crisp fruit. It is juicy and aromatic and has a sweet-sour taste. The skin can also turn out fully red or green other than golden-red. It is () th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden Delicious
'Golden Delicious' is a cultivar of apple. It is one of the 15 most popular apple cultivars in the United States. It is not closely related to 'Red Delicious'. History Golden Delicious arose from a chance seedling, possibly a hybrid of 'Grimes Golden' and 'Golden Reinette'. The original tree was found on the Mullins' family farm in Clay County, West Virginia, United States, and was locally known as Mullin's Yellow Seedling and Annit apple. In Clay County, George Deems was instrumental in preserving and perpetuating the original Stark's Golden delicious apple tree on A. H. Mullins property back in 1938. The famed tree came to the attention of the Stark Brothers a number of years before, when Mr. Mullins sent three apples to Mr. Stark one fine April. The Golden Delicious' long keeping qualities were soon abundantly evident to Mr. Stark, as well as to United States Pomologist Colonel Brackett, in Washington, and the nursery bought the tree and ground on which it stands from Mr. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apple
An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple fruit tree, trees are agriculture, cultivated worldwide and are the most widely grown species in the genus ''Malus''. The tree originated in Central Asia, where its wild ancestor, ''Malus sieversii'', is still found today. Apples have been grown for thousands of years in Asia and Europe and were brought to North America by European colonization of the Americas, European colonists. Apples have Religion, religious and mythology, mythological significance in many cultures, including Norse mythology, Norse, Greek mythology, Greek, and Christianity in Europe, European Christian tradition. Apples grown from seed tend to be very different from those of their parents, and the resultant fruit frequently lacks desired characteristics. Generally, apple cultivars are propagated by clonal grafting onto rootstocks. Apple trees grown without rootstocks tend to be larger and much slower to fruit after plantin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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