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Desmodium Yellow Mottle Virus
''Desmodium'' is a genus of plants in the legume family Fabaceae, sometimes called tick-trefoil, tick clover, hitch hikers or beggar lice. There are dozens of species and the delimitation of the genus has shifted much over time. Species are distributed widely – from Quebec to northern Argentina in the Americas, across northern and southern tropical Africa, in the southern Arabian Peninsula, in Myanmar and Thailand, New Guinea, and northern and eastern Australia. Description These are mostly inconspicuous plants; few have bright or large flowers. Though some can become sizeable plants, most are herbs or small shrubs. Their fruit are loments, meaning each seed is dispersed individually enclosed in its segment. This makes them tenacious plants and some species are considered weeds in places. Uses Several ''Desmodium'' species release organic compounds, aerially and into the soil, which make them useful for agriculture: Allelopathic compounds are used there via push-pull tec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmodium Uncinatum
''Desmodium uncinatum'', the silverleaf desmodium, is a species of flowering plant in the family Fabaceae, native to Latin America, and introduced as a fodder Fodder (), also called provender (), is any agriculture, agricultural foodstuff used specifically to feed domesticated livestock, such as cattle, domestic rabbit, rabbits, sheep, horses, chickens and pigs. "Fodder" refers particularly to food ... to various locales in Africa, India, New Guinea, Australia and Hawaii. Although chiefly a fodder, it can also be used for pasture, deferred feed, cut-and-carry, hay, ground cover, and mulch. It is considered invasive in Australia and Hawaii. This species of ''Desmodium'' has also found use in the push-pull technology for pest management where it is grown as an intercrop between rows of a cereal crop to control stem-boring insects and fall armyworms. Together with '' D. intortum'' (greenleaf desmodium) they are the most common two intercrops of push-pull technology. Referen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Manure
In agriculture, a green manure is a crop specifically cultivated to be incorporated into the soil while still green. Typically, the green manure's Biomass (ecology), biomass is incorporated with a plow or disk, as is often done with (brown) manure. The primary goal is to add Soil organic matter, organic matter to the soil for its benefits. Green manuring is often used with legume crops to add nitrogen to the soil for following crops, especially in organic farming, but is also used in Intensive farming, conventional farming. Method of application Farmers apply green manure by blending available plant discards into the soil. Farmers begin the process of green manuring by growing legumes or collecting tree/shrub clippings. Harvesters gather the green manure crops and mix the plant material into the soil. The un-decomposed plants prepare the ground for cash crops by slowly releasing nutrients like nitrogen into the soil. Farmers may decide to add the green manure into the soi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Living Mulch
In agriculture, a living mulch is a cover crop interplanted or undersown with a main crop, and intended to serve the purposes of a mulch, such as weed suppression and regulation of soil temperature. Living mulches grow for a long time with the main crops, whereas cover crops are incorporated into the soil or killed with herbicides. Other benefits of mulches are slowing the growth of weeds, and protecting soil from water and wind erosion. Some living mulches were found to increase populations of the natural enemies of crop pests.Hartwig N.L., H.. Ammon 2002 Cover crops and living mulches Weed Sci. 50: 688-699 Legumes used as living mulches also provide nitrogen fixation, reducing the need for fertilizer. Benefits When cover crops are turned over into the soil, they contribute nutrients to the main crop so that less chemical fertilizer is required.Brophy L. S., G. H. Heichel and M.P. Russelle. 1987 Nitrogen transfer from forage legumes to grass in a systematic planting design Cro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmodium Incanum
:''The ''Desmodium incanum'' of many older sources is actually '' Desmodium laxiflorum''; see below.'' ''Desmodium incanum'', also known as creeping beggarweed, Spanish clover, Spanish tick-trefoil or hitchhikers is a perennial plant native to Central and South America. In Hawaii it is known as kaimi or kaimi clover from the Hawaiian for "seeker". Initially introduced as forage crop around the world, it has spread to many places although it is no longer an important fodder crop. It is considered a weed both within and outside its native range. It has spread through Florida and across the southern USA into southern Texas and across many Pacific islands, including Hawaii. The plant has branched runners for reproduction. Its leaves are elliptic in shape and are hairy, and its flowers are pink to rose in color. Very frustrating in agriculture are its seedpods, which when ripe easily break off from the plant. They are also covered in sticky hairs (trichomes) that stick to any rough ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allomone
An allomone (from Ancient Greek ' "other" and pheromone) is a type of semiochemical produced and released by an individual of one species that affects the behaviour of a member of another species to the benefit of the originator but not the receiver. Production of allomones is a common form of defense against predators, particularly by plant species against insect herbivores. In addition to defense, allomones are also used by organisms to obtain their prey or to hinder any surrounding competitors. Many insects have developed ways to defend against these plant defenses (in an evolutionary arms race). One method of adapting to allomones is to develop a positive reaction to them; the allomone then becomes a kairomone. Others alter the allomones to form pheromones or other hormones, and yet others adopt them into their own defensive strategies, for example by regurgitating them when attacked by an insectivorous insect. A third class of allelochemical (chemical used in interspe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pest (organism)
A pest is any organism harmful to humans or human concerns. The term is particularly used for creatures that damage crops, livestock, and forestry or cause a nuisance to people, especially in their homes. Humans have modified the environment for their own purposes and are intolerant of other creatures occupying the same space when their activities impact adversely on human objectives. Thus, an elephant is unobjectionable in its natural habitat but a pest when it tramples crops. Some animals are disliked because they bite or sting; wolves, snakes, wasps, ants, bed bugs, fleas and ticks belong in this category. Others enter the home; these include houseflies, which land on and contaminate food; beetles, which tunnel into the woodwork; and other animals that scuttle about on the floor at night, like rats and cockroaches, which are often associated with unsanitary conditions. Agricultural and horticultural crops are attacked by a wide variety of pests, the most important being ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insect
Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, Thorax (insect anatomy), thorax and abdomen (insect anatomy), abdomen), three pairs of jointed Arthropod leg, legs, compound eyes, and a pair of antenna (biology), antennae. Insects are the most diverse group of animals, with more than a million described species; they represent more than half of all animal species. The insect nervous system consists of a insect brain, brain and a ventral nerve cord. Most insects reproduce Oviparous, by laying eggs. Insects Respiratory system of insects, breathe air through a system of Spiracle (arthropods), paired openings along their sides, connected to Trachea#Invertebrates, small tubes that take air directly to the tissues. The blood therefore does not carry oxygen; it is only partly contained in ves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grass Moth
Crambidae comprises the grass moth family of lepidopterans. They are variable in appearance, with the nominal subfamily Crambinae (grass moths) taking up closely folded postures on grass stems where they are inconspicuous, while other subfamilies include brightly coloured and patterned insects that rest in wing-spread attitudes. In many classifications, the Crambidae have been treated as a subfamily of the Pyralidae or snout moths. The principal difference is a structure in the tympanal organs called the praecinctorium, which joins two tympanic membranes in the Crambidae, and is absent from the Pyralidae. The latest review by Munroe and Solis, in Kristensen (1999), retains the Crambidae as a full family. The family currently comprises 15 subfamilies with altogether 10,347 species in over 1,000 genera. Systematics *subfamilia incertae sedis **''Conotalis'' Hampson, 1919 **''Exsilirarcha'' Salmon & Bradley, 1956 *Subfamily Acentropinae Stephens, 1836 *Subfamily Crambinae Latre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chilo Partellus
''Chilo partellus'', the spotted stalk borer or spotted stem borer, is a moth in the family Crambidae. It was described by Charles Swinhoe in 1885. It is found in India, Pakistan, Iran, Ethiopia, Lesotho, Madagascar, Malawi, South Africa, Sudan, Tanzania, Uganda and on Mayotte. ''C. partellus'' is a pest that was introduced to Africa most likely from India in the early 20th century. After arriving in Africa, it has spread to nearly all countries in eastern and southern Africa, and it is assumed that it is spreading to western Africa. ''C. partellus'' is indigenous to Asia and became established in eastern Africa in the early 1930s. ''C. partellus'' is one of the most economically damaging pests in Asia and Africa, attacking all parts of the plant except the roots. Habitat ''C. partellus'' has rapidly spread over a wide geographical range and has proven to be a very efficient colonizer and devastating pest wherever it may occur. In general, ''C. partellus'' occurs in low to mid-el ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Striga Hermonthica
''Striga hermonthica'', commonly known as purple witchweed or giant witchweed, is a hemiparasitic plant that belongs to the family Orobanchaceae. It is devastating to major crops such as sorghum (''Sorghum bicolor'') and rice (''Oryza sativa''). In sub-Saharan Africa, apart from sorghum and rice, it also infests maize (''Zea mays''), pearl millet (''Pennisetum glaucum''), and sugar cane (''Saccharum officinarum''). ''Striga hermonthica'' has undergone horizontal gene transfer from ''Sorghum'' to its nuclear genome. The ''S. hermonthica'' gene, ''ShContig9483'', is most like a ''Sorghum bicolor'' gene, and additionally shows significant but lesser similarity to a gene from ''Oryza sativa''. It shows no similarity to any known eudicot gene. Host and symptoms Purple witchweed infects a variety of grasses and legumes in sub-saharan Africa, including rice, maize, millet, sugarcane, and cowpea. The symptoms mimic that of drought or nutrient-deficiency symptoms. Chlorosis, wilt, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Striga Asiatica
''Striga asiatica'', the Asiatic witchweed or the red witchweed, is a hemiparasitic plant in the family Orobanchaceae. It is native to Asia and sub-Saharan Africa, but has been introduced into other parts of the world including Australia and the United States. Asiatic witchweed is a serious agricultural pest, as it parasitises important crop species, including corn, rice, sorghum, and sugar cane, often causing substantial yield reductions. While it is native to Africa and Asia, it is invasive in farmlands of Kenya, Tanzania and Uganda. In the US, this witchweed was discovered in the Carolinas in 1956. It is considered an invasive agricultural pest, and a vigorous eradication campaign has reduced the affected area by 99% rom to about Biological control Biological control or biocontrol is a method of controlling pests, whether pest animals such as insects and mites, weeds, or pathogens affecting animals or plants by using other organisms. It relies on predation, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
