Question

The common weedicide used in cultivating fields is
A.2, 4 – D
B.2,4,5 – T
C.IAA
D.ABA

Answer 1

Hint: The chemicals sprayed on the field to get rid of weeds are weedicides. They are not going to show any impact on crop plants. Ethyl ester, Neem extract, Glyphosate etc are two commonly used weedicides.

Complete answer:
Weedicides are the pesticides which are used to kill the weeds. The bio-weedicides are called herbicides. A herbicide is also commonly called as a weedkiller, which is a pesticide which is used to kill unwanted plants.

2,4-D (2,4-dichlorophenoxy) is a phenoxy herbicide that was developed in the 1940s and is still very useful today. The low cost of 2,4-D has made its continued use possible, making it one of the world's most commonly used herbicides.

2,4,5-Trichlorophenoxyacetic acid is synthetic auxin (also known as 2,4,5-T). It is a herbicide that is used to defoliate broad-leafed plants with chlorophenoxy acetic acid. It was founded in the 1940s. Before I was banned in the early 1970s, I was found to be commonly used in agriculture.
(also known as 2,4,5-T) is a synthetic auxin. It is a chlorophenoxy acetic acid herbicide which is used to defoliate the broad-leafed plants. It was developed in the 1940s. I was found to be widely used in agriculture until it was banned in the initial 1970s.
Indole-3-acetic acid is produced by plants and microorganisms, including bacteria and fungi (IAA). The most common plant hormone in the auxin class is IAA, which controls different aspects of plant growth and development.
Abscisic acid (ABA) is a hormone in plants. In several plant developmental processes, including seed and bud dormancy, organ size regulation and stomatal closure, ABA works. In order to react to environmental stresses such as drought, soil salinity, cold tolerance, freezing tolerance, heat stress and heavy metal ion tolerance, this is particularly important for plants.

Hence, the correct answer is option (A)

Note: If ingested, inhaled, or if it reaches the skin, pure 2,4-D is low in toxicity, and certain types are low in eye toxicity. However, extreme eye irritation may be caused by the acid and salt types of 2,4-D.