Plant Pathology - Study Mode

[#186] Loose smut of wheat is
Correct Answer

(A) Internally seed borne

Explanation

Solution: Loose smut of wheat is internally seed-borne. Loose smut of barley and wheat are internally seed-borne and carried as a small colony of fungus inside the seed embryo rather than as spores on the seed coat. These are the only internally seed-borne smuts that occur in Australian cereal crops. Contaminated machinery and soil do not transmit these diseases.

[#187] Study of pollen grains is
Correct Answer

(A) Palynology

Explanation

Solution: Study of pollen grains is Palynology. The study of pollen is called palynology and is highly useful in paleoecology, paleontology, archaeology, and forensics. Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination.

[#188] Which of the following is a sticker?
Correct Answer

(D) All of these

Explanation

Solution: Fish oil, Linseed oil and Gum arabic are stickers.

[#189] Chlorophyll is soluble in
Correct Answer

(B) Organic solvent

Explanation

Solution: Chlorophyll is soluble in Organic solvents. Chlorophyll is any of several related green pigments found in cyanobacteria and the chloroplasts of algae and plants. Chlorophyll is not soluble in water, and it is first mixed with a small quantity of vegetable oil to obtain the desired solution. It is soluble in alcohol, ether, and other organic solvents.

[#190] RSD is caused by
Correct Answer

(D) Both B and C

Explanation

Solution: RSD is caused by Gram (+) fastidious bacteria and Clavibacter xyli. The ratoon stunting disease (RSD), is caused by the fastidious gram-positive bacteria Leifsonia xyli subsp. xyli, is the most important sugarcane disease. Production losses may exceed 50%, depending on the susceptibility of the genotype.