Plant Pathology MCQ Question and Answer | Agriculture MCQ Question

The Urediospore spore of rust fungus is repeating.
Rusts are plant diseases caused by pathogenic fungi of the order Pucciniales. Rust fungi are highly specialized plant pathogens with several unique features.
These serve as repeating dikaryotic vegetative spores. These spores are referred to as the repeating stage because they can cause auto-infection on the primary host, re-infecting the same host on which the spores were produced.

Citrus tristeza virus is Semi persistent.
Citrus tristeza virus (CTV) is transmitted by several aphid species in a semi-persistent manner with Toxoptera citricida, the brown citrus aphid (BrCA), being the most efficient.
Citrus tristeza virus (CTV) belongs to the Closterovirus genus, which potentially caused an economic loss in citrus plants and produces subgenomic noncoding RNAs called LMT1.

The alternate host of leaf rust of wheat is Thalictrum.
Wheat leaf rust (Puccinia triticina) is a fungal disease that affects wheat, barley, rye stems, leaves and grains. P. triticina is heteroecious, requiring two distinct hosts (alternate hosts).
The alternate host for leaf rust (Puccinia triticina) is Thalictrum speciosissimum (meadow rue); and for crown rust (Puccinia coronate) is Rhamnus cathartica (buckthorn).

Flour is a Wetting agent.
Wetting agents are commonly used to reduce the surface tension of water and thus help the water-based solutions to spread.
Wetting agents are utilized in many different products. In the coating industry, wetting agents help the fluid phase to wet pigment particles during the pigment dispersion process.

An NPK complex can be used if the dose asks for NPK.
NPK complex is a solid three-nutrient fertilizer in a single granule that is produced via chemical or physical processes but excluding bulk blends. And normal NPK is a complex fertilizer that contains all three major nutrients 10% Nitrogen, 26% Phosphorous and 26% Potash.
As both are the same, thus, NPK complex can be used if an NPK dose is required.

Cereal straw is a particularly rich source of Potash.
Straw is an agricultural byproduct consisting of dry stalks of cereal plants after the grain and chaff have been removed. It has several different uses, including fuel, livestock bedding, fodder, thatching and basket making.
Straw may be fed as part of the roughage component of the diet to cattle or horses. It has a low digestible energy and nutrient content. It is a particularly rich source of Potash.

The female gametophyte of angiosperms is represented by the Embryo sac.
The female gametophyte develops within the ovule and generally consists of three antipodal cells, one central cell, two synergid cells, and one egg cell.
The female gametophyte is also commonly called the embryo sac or megagametophyte.

The black heart of potato is caused due to O₂ deficiency.
The black heart occurs primarily in storage when the tubers do not receive enough oxygen.
Blackening of the tuber center follows acute oxygen deficiency associated with an either low temperature in confined storage or high field soil temperatures. The tissue dies from the inside out and turns jet black.

Triple super phosphate contains 40 - 48% P₂O₅.
Triple superphosphate is a component of fertilizer that primarily consists of monocalcium phosphate, Ca(H₂PO₄)₂. Triple superphosphate is obtained by treating phosphate rock with phosphoric acid.
Triple superphosphates [TSPs, Ca(H₂PO₄)₂·H₂O] were produced by exothermic reactions of oyster shells and different concentrations of phosphoric acid in a molar ratio of 1 : 2.

Yellow mosaic of legumes was first reported in India from Delhi.
Yellow mosaic disease (YMD) was first reported in western India in the late 1940s in Lima bean and later in mungbean in northern India.
Yellow mosaic virus (Begomovirus) is a major exotic disease of mungbean causing leaf discoloration and yield losses. The virus is spread between plants by the Silverleaf white fly (Bemisia tabaci).