Plant Pathology - Study Mode

[#751] Match the following columns: Column I (Available nutrients) Column II (Extractant) a. Boron 1. 0.15% Cacl 2 Solution b. Nitrogen 2. Hot water c. Sulpher 3. Alkaline KMNO 4
Correct Answer

(C) a-2, b-3, c-1

Explanation

Solution: a. Hot water is the extractant of Boron. Boron is extracted with near-boiling deionized water on a heating block. Boron in the extract is reacted with curcumin to form an orange-coloured complex. The concentration of B is determined colorimetrically or by UV-Vis spectrophotometry. Each chemical compound should be treated as a potential health hazard. b. Alkaline KMnO 4 is the extractant of Nitrogen. The easily hydrolyzable and oxidisable fractions of organic nitrogen present in a soil sample can be extracted using alkaline KMnO 4 - a mild oxidizing agent. c. 0.15% Cacl 2 solution is the extractant of Sulphur. 0.15% CaCl 2 extracted S in the range of 13.00 to 26.50 mg kg -1 , with a mean value of 19.26 mg kg -1 . The lowest amount of S (mean value of 8.21 mg kg -1 ) has been extracted by 0.001 M HCl with a range of 3.75 to 14.25 mg kg -1 .

[#752] MLO first discovered by
Correct Answer

(C) Doi

Explanation

Solution: MLO was first discovered by Doi. Mycoplasma-like organisms (MLO), pathogens of the plant yellows diseases, as a model of coevolution between prokaryotes, insects and plants. Phytoplasmas, a large group of plant-pathogenic, phloem-inhabiting bacteria were discovered by Japanese scientist Doi in 1967. They are transmitted from plant to plant by phloem-feeding insect hosts and cause a variety of symptoms and considerable damage in more than 1,000 plant species.

[#753] Blood meal contains
Correct Answer

(C) 13 - 20% N

Explanation

Solution: Blood meal contains 13 - 20% N. A blood meal is extremely rich in Nitrogen. It contains about 13 - 20% Nitrogen, 1% phosphorous, and 0.6% of potassium. It is a dry, inert powder made from blood, used as a high-nitrogen organic fertilizer, non-synthetic, and high protein animal feed. A blood meal is composed of protein mostly, small amounts of fats, and ash. It usually comes from cattle or hogs as a slaughterhouse by-product.

[#754] Most widely used fungicide for smut fungi is
Correct Answer

(A) Vitavax

Explanation

Solution: The most widely used fungicide for smut fungi is Vitavax. Vitavax Power (Carboxin 37.5% + Thiram 37.5% DS) is a broad spectrum, dual-action (systemic and contact) fungicide which controls seed and soil-borne diseases, and also acts as a plant growth stimulant. It is used as a seed treatment and is effective against damping-off diseases caused by Rhizoctonia and against the various smuts of grain crops.

[#755] IFFCO was formed in the year of
Correct Answer

(B) 1967

Explanation

Solution: IFFCO was formed in the year of 1967. Indian Farmers Fertiliser Cooperative Limited, also known as IFFCO, is a multi-state cooperative society. IFFCO is wholly owned by the Cooperative Societies of India. Society is engaged in the business of manufacturing and marketing fertilizers. IFFCO is headquartered in New Delhi, India. Starting in 1967 with 57 member cooperatives, it is today the biggest co-op in the world by turnover on GDP. With the introduction of a multi-agency approach by the Government of India in the distribution of fertilizers in 1967, the private trade also entered the field of fertilizer distribution.