DAILY CURRENT AFFAIRS IAS | UPSC Prelims and Mains Exam –27th July 2023
Archives (PRELIMS & MAINS Focus) Silver cockscomb Syllabus Prelims –Environment and Ecology Context: Studies have shown that Silver cockscomb is not a troublesome weed for Karnataka’s Soliga tribe. Background:- Silver cockscomb is a troublesome weed. ( Expansion of the Invasive Plants) If left unchecked, it can spread quickly and suppress the growth of other crops, affecting their yield. But for the Soliga tribe, silver cockscomb is a nutritious leafy green vegetable that grows well even on fallow land and in drought-like conditions. About Silver cockscomb:- Silver cockscomb is a short-lived 50-60 cm-tall plant. It is also known as Lagos spinach. Scientific name: Celosia argentea . Local Names:- In Karnnada: Anne soppu In Marathi: Kurdu In Tamil: Pannai keerai Family: Amaranthaceae family. The family includes economically important plants like spinach, beetroot and quinoa. It bears simple, spirally arranged leaves around the stem with pinkish or silky white flowers. It grows well even on fallow land and in drought-like conditions. Its leaves have lower levels of oxalic acid and phytic acid. Uses of Silver cockscomb:- It grows widely on farmlands across the country and most farmers use the plant as Soliga tribe use it as a nutritious leafy green vegetable, as it is high in nutrients such as beta-carotene and folic acids, and has vitamin E, calcium and iron. It is frequently used in traditional Chinese and Indian medicine for treating eye diseases and ulcers. (WHO and Traditional Medicine) About the Soliga tribe:- They are an indigenous tribe of Karnataka. Location: They reside in the peripheral forest areas near Biligiri Rangana Hills and Male Mahadeshwara in the Chamarajnagar district of Karnataka. They are the first tribal community living inside the core area of a tiger reserve in India to get their forest rights officially recognised by a court of law. MUST READ: New genus of parasitic flowering plant SOURCE: DOWN TO EARTH PREVIOUS YEAR QUESTIONS Q.1) Consider the following trees: (2023) Jackfruit (Artoca7pus heterophyllus) Mahua (Madhuca indica) Teak (Tectona grandis) How many of the above are deciduous trees? Only one Only two All three None Q.2) Consider the following statements (2023) Statement-I: Marsupials are not naturally found in India. Statement-II: Marsupials can thrive only in montane grasslands with no predators. Which one of the following is correct in respect of the above statements? Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I Statement-I is correct but Statement II is incorrect Statement-I is incorrect but Statement II is correct Ludwigia peruviana Syllabus Prelims –Environment and Ecology Context: As per recent reports, Ludwigia Peruviana is threatening the elephant habitats in Tamil Nadu. Background:- Ludwigia peruviana, has infested the majority of the hill station’s swamps, where elephants used to find lush grass even in the summer. It is among the 22 priority invasive plants in Tamil Nadu. About Ludwigia peruviana:- Ludwigia peruviana is an invasive aquatic weed. (Invasive alien plants in Nilgiri Biosphere Region) Habitat: it is originally native to Central and South America. It is an aquatic plant, which is now challenging the existence of local vegetation in various swampy areas around the world. It is a perennial shrub. Perennial: A plant that lives for more than two years. It is deciduous in cooler climates and evergreen in warmer tropical climates. It can form floating islands on the water’s surface. The plant can grow to a height of about 12 feet. Leaves are:- Oval to lance-shaped with a pointed tip and narrow base. Hairy and prominently veined. Flowers are:- Its flower is pale yellowish in colour. Each flower lasts for only one day. Issues with Ludwigia peruviana:- It is an aquatic plant, which is now challenging the existence of local vegetation in various swampy areas around the world. It grows faster in wetlands than other harmful weeds. It has shaken the balance of these perennial foraging grounds, limiting the growth of grass and native plants that are palatable to elephants and other animals including gaur. It grows in swamps and there is little scope to use machinery. Even if Ludwigia is pulled out manually, the soft plant easily breaks and it spreads again from the root or broken stems that fall in the swamp Ways to control Ludwigia peruviana:- Prevention: Reducing nutrient runoff into the waterway can limit growth. Physical removal: Seedlings can be pulled or dug out. Disposal: Plants can be destroyed by burning or deep burial. Slashing/Fire: Larger infestations may be slashed and burnt. Chemical control: Spraying glyphosate. Cut stump method: Cut the main stems, and apply herbicide gel to the stump within 15 seconds of cutting. MUST READ: Water Hyacinth SOURCE: THE HINDU PREVIOUS YEAR QUESTIONS Q.1) Consider the following statements: (2023) Some mushrooms have medicinal properties. Some mushrooms have · psychoactive properties. Some mushrooms have insecticidal properties. Some mushrooms have bioluminescent properties. How many of the above statements are correct? · Only one Only two Only three All four Q.2) ‘Invasive Species Specialist ·group’ (that develops Global Invasive Species Database) belongs to which one of the following organizations? (2023) The International Union for Conservation of Nature The United Nations Environment Programme The United Nations World Commission for Environment and Development The World Wide Fund for Nature National Statistical Organisation (NSO) Syllabus Prelims –Economy Context: The Government of India recently appointed a panel to review the methodology used by the National Statistical Organisation (NSO). Background:- The panel is appointed under the chairmanship of Pronab Sen, former Chief Statistician of India. This happened in the backdrop of articles by Shamika Ravi and Bibek Debroy arguing the usage of outdated survey methodology by national surveys. According to them, this archaic methodology has failed to capture reality in the recent past as the “Indian economy has been incredibly dynamic in the last 30 years”. The Pronab Sen Committee will attempt to address these concerns to make the sample adequately representative. About National Statistical Organisation (NSO):- Established: 2019. The National Sample Survey Office (NSSO)
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