Plant Pathology - Study Mode

[#436] Ammonium sulphate contains
Correct Answer

(A) 20.6% N

Explanation

Solution: Ammonium sulphate contains 20.6% N. Ammonium sulfate ((NH 4 ) 2 SO 4 ) is an inorganic salt with several commercial uses. The most common use is as a soil fertilizer since the chemical contains 21% (w/w) nitrogen and 24% (w/w) sulfur.

[#437] The false smut of sugarcane can be controlled by adopting
Correct Answer

(D) All of these

Explanation

Solution: The false smut of sugarcane can be controlled by adopting avoid the practice of ratooning, Disinfection of setts before planting, and Removal of smutted whips from the field. Sugarcane smut is a fungal disease of sugarcane caused by the fungus Sporisorium scitamineum. The disease is known as culmicolous, which describes the outgrowth of fungus on the stalk of the cane. The management of sugarcane smut is done through the use of resistant cultivars, fungicide, and using disease free planting stock. Control is mainly accomplished through the use of resistant cultivars in areas where the disease is present. Fungicides also are used in the control of this disease, but typically resistant cultivars are preferred due to the cost of fungicides.

[#438] Maximum transpiration occurs from
Correct Answer

(D) Periderm and lenticels

Explanation

Solution: Maximum transpiration occurs from Periderm and lenticels. Lenticels are spongy openings in the periderm that allow for gas diffusion into and out of the stem or root. The periderm acts as armor protecting the plant's inner tissues from biotic and abiotic stress. Among the given options, maximum transpiration occurs from periderm and lenticels.

[#439] Endosperm of angiosperms is produced after fertilization ora male gamete with
Correct Answer

(C) Secondary nucleus

Explanation

Solution: The endosperm of angiosperms is produced after fertilization of a male gamete with a Secondary nucleus. The endosperm is a tissue produced inside the seeds of most flowering plants following double fertilization. It is triploid (meaning three chromosome sets per nucleus) in most species, which may be auxin-driven. The endosperm is the tissue that surrounds and nourishes the embryo in the seeds of angiosperms (flowering plants).

[#440] The causal organism Erysiphe graminis sp. tritici produces
Correct Answer

(B) Cleistothecia

Explanation

Solution: The causal organism Erysiphe graminis sp. tritici produces Cleistothecia. Erysiphe graminis f.sp. tritici is a plant pathogen that causes a fungal infection known as powdery mildew. A cleistothecium (plural: cleistothecia) is a globose, completely closed fruit body with no special opening to the outside. The ascomatal wall is called peridium and typically consists of densely interwoven hyphae or pseudoparenchyma cells produced by fungus infection.