Horticulture - Study Mode

[#456] Black tip of mango is caused by
Correct Answer

(D) None of these

Explanation

Solution: The black tip of mango is caused by pollutant gases such as carbon monoxide, Sulphur dioxide, flouride, etc that emanate from brick kiln fumes. It is not caused by any microorganisms such as viruses, fungi and bacteria. The black tip is a serious disorder that is capable of causing considerable set back to the grower. Among the commercial cultivars, Dashehari is most prone to the disorder, while Lucknow Safeda is least. A spray of 1% borax at the time of fruit set, followed by two more sprays at 10-day intervals might be useful in controlling the disorder.

[#457] Pungency in garlic is due to
Correct Answer

(C) Diallyl disulphide

Explanation

Solution: Pungency in garlic is due to Diallyl disulphide. Garlic belongs to the Allium family of plants that produce organosulfur compounds, such as allicin and diallyl disulfide (DADS), which account for their pungency and spicy aroma. Diallyl disulfide is an organic disulfide where the organic group specified is allyl. It has been isolated from garlic and other species of the genus Allium. It has a role as an antineoplastic agent, an antifungal agent and a plant metabolite.

[#458] Medicinal plant with antiobesity property is
Correct Answer

(A) Guggal

Explanation

Solution: A medicinal plant with antiobesity properties is Guggal. Guggul is used for acne, hardening of the arteries (atherosclerosis), weight loss and other conditions. It is a flowering plant in the family Burseraceae, which produces a fragrant resin called guggal, that is used in incense and Vedic medicine.

[#459] Which is the drought resistant crop?
Correct Answer

(A) Sweet potato

Explanation

Solution: Sweet potato is a drought-resistant crop. Drought resistance or tolerance is a broader term applied to plant species with adaptive features that enable them to escape, avoid, or tolerate drought stress. The prolific root system of sweet potato makes it a drought-tolerant crop, although supplementary irrigation is required at the time of planting for proper sprouting and establishment. Water stress reduces stem extension and internode diameter of sweet potato cultivars.

[#460] Maximum concentration of invert sugar in Jam should not exceed
Correct Answer

(A) 40%

Explanation

Solution: The maximum concentration of inverted sugar in Jam should not exceed 40% . Inverted sugar syrup is a syrup mixture of the monosaccharides glucose and fructose, that is made by hydrolytic saccharification of the disaccharide sucrose. Jam contains inverted sugar formed by the heating process and the acid content of the fruit. This sugar preserves the jam for long periods. Golden syrup is a syrup of about 55% inverted syrup and 45% table sugar (sucrose).