Plant Pathology - Study Mode

[#886] Single super phosphate is manufactured from
Correct Answer

(A) Rock phosphate

Explanation

Solution: Single super phosphate is manufactured from Rock phosphate. Superphosphate was made from rock phosphate ore by treatment with sulfuric acid. Triple superphosphate is a component of fertilizer that primarily consists of monocalcium phosphate, Ca(H 2 PO 4 ) 2 . Traditional routes for extraction of phosphate rock using sulfuric acid give single superphosphate, an approximate 1 : 1 mixture of Ca(H 2 PO 4 ) 2 and CaSO 4 phosphogypsum.

[#887] Plants purify air during
Correct Answer

(A) Photosynthesis

Explanation

Solution: Plants purify the air during Photosynthesis. Plants purify the air during photosynthesis, the process by which plants convert light and carbon dioxide into food to fuel growth and create oxygen along the way. Through photosynthesis, they convert the carbon dioxide we exhale into fresh oxygen, and they can also remove toxins from the air we breathe.

[#888] Select the disease in which small droplets of pinks or light honey coloured fluid (the honeydew stage) exudes from the spikelets
Correct Answer

(C) Ergot of bajra

Explanation

Solution: The disease in which small droplets of pink or light honey-coloured fluid (the honeydew stage) exudes from the spikelets is Ergot of bajra. Cream to pink mucilaginous droplets of "honeydew" ooze out of infected florets on pearl millet panicles and form sclerotia. And within 10 to 15 days, the droplets dry and harden, and dark brown to black sclerotia develop in place of seeds on the panicle. Sclerotia are larger than seeds and irregularly shaped, and generally get mixed with the grain during threshing.

[#889] Tick out the weed fungi for lab
Correct Answer

(A) Aspergillus

Explanation

Solution: Aspergillus is the weed fungi for lab from the given options. Aspergillus niger is called the "weed of microbiology lab" due to its ubiquitous nature. Its spores are found almost everywhere. It causes diseases known as "Black molds" for example "black mold of onion". Aspergillus species are used in the fermentation industry, but they are also responsible for various plant and food secondary rot, with the consequence of the possible accumulation of mycotoxins.

[#890] Aspergillus niger test is used for
Correct Answer

(D) Cu and Mg

Explanation

Solution: Aspergillus niger test is used for Cu and Mg. Aspergillus niger is a haploid filamentous fungus that is used for waste management and biotransformations in addition to its industrial uses, such as the production of citric acid and extracellular enzymes. The use of Aspergillus niger (Mulder's M strain) as a test organism for determining Mg, Cu, Zn and Mo in soils, and the last-named in tissue extracts and the ash of plants.