Herbicides, also commonly known as weedkillers, are substances used to control unwanted plants. Selective herbicides control specific weed species, while leaving the desired crop relatively unharmed, while non-selective herbicides can be used to clear waste ground, industrial and construction sites, railways and railway embankments as they kill all plant material with which they come into contact. Apart from selective/non-selective, other important distinctions include persistence, means of uptake, and mechanism of action. Historically, products such as common salt and other metal salts were used as herbicides, however these have gradually fallen out of favor and in some countries a number of these are banned due to their persistence in soil, and toxicity and groundwater contamination concerns. Herbicides have also been used in warfare and conflict.
Weed control is the botanical component of pest control, which attempts to stop weeds, especially noxious weeds, from competing with desired flora and fauna including domesticated plants and livestock, and in natural settings preventing non native species competing with native species.
Hydrilla (waterthyme) is a genus of aquatic plant, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species. It is native to the cool and warm waters of the Old World in Asia, Africa and Australia, with a sparse, scattered distribution; in Australia from Northern Territory, Queensland, and New South Wales.
Pistia is a genus of aquatic plants in the arum family, Araceae. It is the sole genus in the tribe Pistieae which reflects its systematic isolation within the family. The single species it comprises, Pistia stratiotes, is often called water cabbage, water lettuce, Nile cabbage, or shellflower. Its native distribution is uncertain but is probably pantropical; it was first discovered from the Nile near Lake Victoria in Africa. It is now present, either naturally or through human introduction, in nearly all tropical and subtropical fresh waterways and is considered an invasive species as well as a mosquito breeding habitat. The genus name is derived from the Greek word πιστός (pistos), meaning "water," and refers to the aquatic nature of the plants. The specific epithet is also derived from a Greek word, στρατιώτης, meaning "soldier," which references the sword-shaped leaves of some plants in the Stratiotes genus.
Kwan Phayao is a lake in Phayao Province, northern Thailand. Kwan, a word from the northern Thai language, means 'lake' or 'large swamp'. The shape of the lake is a nearly-half-circle-moon shape. Phayao Lake is the largest freshwater lake in the northern region and the fourth largest in the country, with a depth of 1.5 metres, and covers an area of about 1,980 hectares. There are about 50 species of fish in Phayao Lake.
Cyperus rotundus is a species of sedge (Cyperaceae) native to Africa, southern and central Europe, and southern Asia. The word cyperus derives from the Greek κύπερος, kyperos, and rotundus is from Latin, meaning "round". The earliest attested form of the word cyperus is the Mycenaean Greek 𐀓𐀞𐀫, ku-pa-ro, written in Linear B syllabic script.
Johnson grass or Johnsongrass, Sorghum halepense, is a plant in the grass family, Poaceae, native to Asia and northern Africa. The plant has been introduced to all continents except Antarctica, and most larger islands and archipelagos. It reproduces by rhizomes and seeds.
Yusuf Bilyarta Mangunwijaya, was an Indonesian architect, writer, and Catholic religious leader. He was popularly known as Romo Mangun.
Pontederia crassipes - commonly known as common water hyacinth, - is an aquatic plant native to the Amazon basin, and is often a highly problematic invasive species outside its native range. It is the sole species of Pontederia subg. Oshunae.
Ambarawa is a town located between the city of Semarang and Salatiga in Central Java, Indonesia. Administratively, it is bordered by the districts of Banyubiru to the south, Jambu to the west, Bandungan to the north, and Bawen to the east.
Semarang is a landlocked regency in Central Java province in Indonesia. It covers an area of 950.207 km2 and had a population of 930,727 at the 2010 Census, 999,817 at the 2015 Census and 1,053,094 at the 2020 Census. These figures exclude the independent cities of Semarang and Salatiga, which are administratively separate from the regency. The Regency's capital is Ungaran, which lies immediately to the south of Semarang City.
Puteri Indonesia is a national beauty pageant in Indonesia that selects the winners to represent the country in two of the Big Four major international beauty pageants; namely Miss Universe and Miss International. The pageant also selects representative for Miss Supranational pageant. Puteri Indonesia is traditionally held in March, alongside the celebration of International Women's Day.
Solanum tampicense, also known as wetland nightshade, aquatic soda apple, and scrambling nightshade, is a perennial in the Solanaceae or Nightshade Family. It can exist as a vine, tree, or shrub and is native to the West Indies and Central America. It is classified as a noxious weed by the United States Department of Agriculture and by several states and is known as an invasive species in the state of Florida.
Panicum repens is a species of grass known by many common names, including torpedograss, creeping panic, panic rampant, couch panicum, wainaku grass, quack grass, dog-tooth grass, and bullet grass. Its exact native range is obscure. Sources suggest that the grass is native to "Africa and/or Asia", "Europe or Australia", "Eurasia", "Australia", "Europe, Asia, and Africa", or other specific regions, including the Mediterranean, Israel, and Argentina. It is present in many places as an introduced species and often a noxious weed. It has been called "one of the world's worst weeds."
Kampoeng Rawa is a tourist attraction in Ambarawa, Central Java, located within the green belt around Lake Rawa Pening. Opened in August 2012, it is owned and operated by twelve groups of farmers and fishermen who were funded by the Artha Prima Credit Union. It is intended to improve the welfare of local farmers and fishermen while promoting an understanding of the lake's ecology. Facilities include a floating restaurant, pendopo, crafts centre, fishing area, and docks. During holidays the site may be visited by several thousand people. It has been challenged for its lack of permission to build in the green belt and the possible ecological impact.
Atmaram Bhairav Joshi was an Indian agricultural scientist and academic, known for his contributions to the field of wheat and other crop breeding. He was the vice-chancellor of Mahatma Phule Krishi Viswavidyalaya, Rahuri and the chairman of the Research Advisory Committee of the Indian Agricultural Research Institute, New Delhi. The Government of India awarded him the fourth highest Indian civilian award of Padma Shri in 1975.
Aquatic plant management involves the science and methodologies used to control invasive and non-invasive aquatic plant species in waterways. Methods used include spraying herbicide, biological controls, mechanical removal as well as habitat modification. Preventing the introduction of invasive species is ideal.
Pekarangan is a type of tropical home garden developed in Indonesia, mainly in Java. Pekarangans typically contain plants, while some possess animals and structures such as pens and bird cages. The gardens yield food for subsistence and income, and plants for ornamental use. Along with their subsistence and commercial uses, they are used for social interactions and yield sharing and provide materials for cultural ceremonies and religious practices. Some pekarangans are made, maintained, and spatially arranged according to local values. Home gardens of this kind may have existed for several thousand years, but their first mention is found in a Javanese chronicle that was written in 860 AD. In 2010, around 103,000 square kilometers (40,000 sq mi) of Indonesian land were used for gardens of this sort.
Cyanazine is a herbicide that belongs to the group of triazines. Cyanazine inhibits photosynthesis and is therefore used as a herbicide.
PT Perkebunan Nusantara IX, abbreviated PTPN 9, is a state-owned Indonesian agricultural company for the cultivation and processing of sugar cane, rubber, tea and coffee with its own plantations and factories at locations in Central Java.
