Fungal disease of plants that are important in the
mold is the major cause of plant diseases. Since there are more than 8000 species of fungi that can cause diseases to plants. In Thailand found mold in class, these are the major causes of plant diseases
1. Class Zygomycets a lower animal groups Phycomycetes look is important. Coenocytic fibers are asexual spores that create immobile in a bag called a sporangium and spores that. sporangiospore create sexual spore type zygospore examples of infectious diseases, including Seaknun rot Rhizopus sp. flower rot disease of melon different types of infection Choanephora Cucurbitarum
2. Class oomycetes fungi in the same group Zygomycetes manner similar to zygomycetes except as asexual spores. species that swim (zoospore) and generate sexual spores from a combination of oogonium and antheridium which have different sizes called oospores fungi in the class, there are several species that are of economic importance, such as rust, white (white. rust) of beet were caused by Albugo spp., mildew (downy mildews), disease dare rot (damping off) from infection by Pythium spp., blight in potatoes (potato late blight) from spreading Phytophthora infestans and so on.
3. Class Ascomycetes fungus class families can be divided into several parts according to the species. Key characteristics of the mold in this class is to create sexual spores in a bag with a number from 2-8, mold spores, called ascospores in this class and that class is the most important. Due to damage to the crop species. In tropical countries often do not find sexual stage but will find asexual spores which, when fed on plants or under the raised right can encourage bacteria build ascocarp and ascospore the case, undetected sexual stage is commonly used name. Representative examples of the form class Deuteromycete disease found in Thailand, including the rubber vine disease flow (gummy stem blight) in melon caused by Didymella Bryoninae
4. Class Basidiomycetes. The chemical resistance is divided into several families look is created sexual spores resemble a teardrop called basidiospore on Rod holds a baton called basidium which may build up on the fibers directly or organs resulting from the merger of. fiber, various shapes such as mushroom fungi such organs called basidiocarp most helpful in this class. Is used as food for humans and animals. Acting biodegradable litter to release nutrients back into the food cycle. But there are many species that are serious pest for example, bacteria that cause rust (rust), mildew, smut (smut), mildew grain mustard (sclerotium stem rot), sheath blight of rice. (Rhizoctonia sheath blight) on the diagnosis of diseases caused by infection in this class will examine the characteristics of the spores or resting stracture sclerotium tablet, which looks like a ball like a mustard seed, then. May also consider the nature of the fibers, which are usually clamp connection between adjacent cells
5. Form-class Deuteromycetes fungus is a fungal form-class distance yet undetected using sexual propagation characteristics. Thus, the organization may temporarily run a form class Imperfect fungi was due to the particular nature of the asexual stage, primarily in discrimination. The majority found that the fungus has a name in the asexual stage is mold in the class Ascomycetes there is some mold in the class Basidiomycetes. And a very rare species in the class Zygomycetes or Oomycetes In Thailand, a tropical country then. Fungi, particularly Ascomycetes often no sexual stage because there is no requirement that must be infected over the winter. Fungus known name or a name in a form class Deuteromycetes. Which may be classified as (order) is as follows:
5.1 Hyphales (Moniliales) mold is created during asexual spores or mycelium on weekdays. No special organs Examples of such infections Powdery mildew pathogen (Oidium, Oidiopsis, Ovuliopsis) infection Cercospora (leaf spot disease caused frog of many plants) infection Pyricularia (the blight of rice) or
5.2 Sphaeropsidales. The infection created asexual spores organs caused by compression together of fiber-shaped people Oฑ (pycnidia) Examples include Ascochyta causing blight, leaf spot of many plants, Diplodia (disease stems dry, branches. dry) Phyllosticta cause leaf spot disease of many plants, Phoma, Phomopsis stalk rot diseases of vegetables. And many perennials
5.3 Melanconiales generate asexual spores infected the organ, shaped like a cup mouth (acervulus) infection, for example, Colletotrichum. The disease Titles (Anthracnose) Marssonina infection causes black spot disease of roses, etc.
5.4 Myceliales or Mycelia Sterilia (sterile fungi) are infections that do not meet building asexual spores that look different from normal fibers. The season is over, will create special structures called sclerotia, which is caused by the fibers compressed together tightly like a mustard seed, for example, Sclerotium infectious diseases and root rot of plants infected with Rhizoctonia cause rot. So
the diagnosis of diseases caused by fungal
diseases caused by fungi, most from the symptoms attributed to detect traces (sign) of the infected parts of the plant to detect symptoms may sign a magnifying glass or a stereo camera Interscope. A preliminary examination If the inspectors are experts might say that the disease is caused by anything. For symptoms caused by mold symptoms include leaf spot (leaf spot) leaf blight (leaf blight) Top Burns (die back), branches dry (twig blight), Titles (anthracnose) I fell (damping off), root and. rot (root and stalk rot), the shabby (decline), scab (scab) and wither (wilt), or certain diseases, diseases will be covered at the show made more pronounced symptoms such as mildew. rust, downy mildew, powdery mildew, these diseases can be easily diagnosed by viewing only sign of infection created.
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