chemistry

Imazosulfuron

Imazosulfuron is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Imazosulfuron rather than just read about it. In short: Imazosulfuron is a selective sulfonylurea herbicide to control sedges and broadleaf weeds. It is a preëmergent and postemergent herbicide.

Key takeaways

Imazosulfuron belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Imazosulfuron to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Imazosulfuron from memory before moving on to harder problems.

Reference excerpt

Imazosulfuron is a selective sulfonylurea herbicide to control sedges and broadleaf weeds. It is a preëmergent and postemergent herbicide. In the US, it was first registered in 2010 and is approved for residential and commercial use on turfgrass, rice, tomatoes and peppers. It is not approved in the European Union. The maximum application rate in the US is 0.3 lbs per acre (0.3 kg/Ha) for food use, or 0.67 lbs per acre (0.75 kg/Ha) for turf.

Mode of action Imazosulfuron inhibits the enzyme acetolactate synthase, preventing synthesis of branch chain amino acids like valine, leucine, and isoleucine, which are necessary for cell formation. It is absorbed through roots and foliage, and translocates through xylem and phloem. Imazosulfuron's mode of action makes its HRAC classification Group B (Australia, Global) or Group 2 (numeric).

Environmental behaviour Imazosulfuron is moderately mobile in soil, but is not volatile and so will not be moved atmospherically after application. It degrades primarily through aerobic and anaerobic biodegradation and aqueous photolysis. In soil, its half life is expected to be several weeks, but the water halflife is 3.5 days due to photolysis. Movement is expected by runoff and leaching, but contamination is not expected to be persistent. It is practically non-toxic to birds, mammals and honeybees, and no significant toxicity was found to fish.

Safety Imazosulfuron is of low toxicity via oral, inhalatory or dermal exposure. It is not an eye nor skin irritant, nor a skin sensitizer. In chronic exposure trials, the liver is the main affected organ, though rats given >1000 mg/kg/day (equivalent to about a shot-glass of pure imazosulfuron daily for an 80 kg person) developed eye problems after three months. Chronic exposure studies often showed weight gain or loss. Mild to moderate thyroid effects were reported only in the study of chronic exposure to dogs. Subchronic trials showed no neurotoxicity. No developmental or reproductive toxicity was found except at the highest dosage tested (892 mg/kg/day) on rats. No evidence of carcinogenicity was found.

References

Illustrations

Worked examples

Example 1 — a first encounter with Imazosulfuron

Start with the simplest possible case. Write down what Imazosulfuron claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Imazosulfuron before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Imazosulfuron ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Imazosulfuron

In research: Imazosulfuron appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Imazosulfuron in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Imazosulfuron is common in secondary-school and first-year university syllabi. It links to neighbouring topics Chloroarenes, Group 2 herbicides, Imidazopyridines, so understanding it makes those chapters shorter.
In everyday life: Look for Imazosulfuron outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Imazosulfuron in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Imazosulfuron means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Imazosulfuron out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Imazosulfuron in simple terms?

Imazosulfuron is a selective sulfonylurea herbicide to control sedges and broadleaf weeds. It is a preëmergent and postemergent herbicide.

Why does Imazosulfuron matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Imazosulfuron?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Imazosulfuron.