Question

In the wheat field some broad -leaved weeds were seen by a farmer. Which plant hormone would you suggest to get rid of the same?

Answer 1

Hint: The trail to killing broadleaf weeds in wheat fields begins with understanding their life cycles. Depending on whether you’re dealing with which types of weeds like annuals, biennials or perennials, the farmer should use herbicides or weedicides according to the type of weeds present in his field.

Complete answer:
Broadleaf weed identification is comparatively simple because they stick out sort of a sore thumb. The leaves look like grass and although a number of their flowers look pretty.

Types of weeds:-
Summer annuals: These weeds begin to germinate in the spring, mature in the summer, and then produce seeds and die by the fall or first hard frost (lifetime-12 months).

Winter annuals: These weeds overlap only 12 months total that is two calendar years. They germinate and develop from late summer to early fall, remain semi-dormant during the winter and then flower in spring.

Perennial weeds: These sorts of broadleaf weeds can germinate and spread from seeds, but they also produce a root structure which will birth new weeds.

Annual weeds: These sorts of broadleaf weeds live for less than one season and are typically easy to regulate because they lack the complex underground structures needed to spread new plant growth through creeping roots.

Biennial weeds: Biennial weeds are the flowering plants that generally live for two years. The first year consists of leaves, stems and root growth. In the second year, biennials flower and produce seeds, thus completing their life cycles.

Hence, auxins are widely used as herbicides/ weedicides to kill broad -leaved weeds, dicotyledonous weeds thanks to their low cost and greater chemical stability. Examples of such auxins are 2,4-D and 2,4,5-T.

Note: Selective herbicides work on specific plants while causing little or no harm to other plant types, e.g., controlling only broadleaf weeds while not harming your field. Non-selective herbicides damage a large range of plants and your field too.