chemistry

Pyraclostrobin

Pyraclostrobin 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 Pyraclostrobin rather than just read about it. In short: Pyraclostrobin is a quinone outside inhibitor (QoI)-type fungicide used in agriculture. Among the QoIs, it lies within the strobilurin chemical class.

Key takeaways

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

Reference excerpt

Pyraclostrobin is a quinone outside inhibitor (QoI)-type fungicide used in agriculture. Among the QoIs, it lies within the strobilurin chemical class.

Use Pyraclostrobin is used to protect Fragaria, Rubus idaeus, Vaccinium corymbosum, Ribes rubrum, Ribes uva-crispa, blackberry (various Rubus spp.), and Pistachio vera.

Target pathogens Pyraclostrobin is used against Botrytis cinerea and Alternaria alternata.

Resistance Resistant populations have been identified in:

Botrytis cinerea on Fragaria in the Carolinas, conferred by the G143A mutation in the partial cytochrome b (CYTB) gene. Botrytis cinerea on Fragaria, Rubus idaeus, Vaccinium corymbosum, Ribes rubrum, Ribes uva-crispa, and blackberry (various Rubus spp.) in Northern Germany. Botrytis cinerea on Fragaria in Florida. Alternaria alternata on Pistachio vera in California.

Geography of use

United States Pyraclostrobin was widely used throughout the United States as of 2017, but especially in the Upper Midwest.

Off-target toxicity Although toxic, and recommended to be avoided by humans, pyraclostrobin is of temporary and low toxicity, that is to say it is merely an irritant of eyes and skin. It does cause some degree of reproductive and developmental failure in mammals but does not absorb well through the skin. It is likely to bioaccumulate in aquatic organisms.

Residues in diet Pyraclostrobin does not accumulate in foods to a significant degree.

Biodegradability Pyraclostrobin is described by one source as not very biodegradable, and by another as possibly significantly biodegradable.

References

Further reading "CID 5327095". PubChem. NCBI, NLM, US NIH. Retrieved 2021-03-02. "Pyraclostrobine". NIST WebBook. National Institute of Standards and Technology. Retrieved 2021-03-02.

Illustrations

Worked examples

Example 1 — a first encounter with Pyraclostrobin

Start with the simplest possible case. Write down what Pyraclostrobin 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 Pyraclostrobin 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 Pyraclostrobin 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 Pyraclostrobin

In research: Pyraclostrobin 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 Pyraclostrobin 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: Pyraclostrobin is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Chlorophenyl compounds, Anilines, Carbamates, so understanding it makes those chapters shorter.
In everyday life: Look for Pyraclostrobin 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 Pyraclostrobin in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pyraclostrobin 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 Pyraclostrobin out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pyraclostrobin in simple terms?

Pyraclostrobin is a quinone outside inhibitor (QoI)-type fungicide used in agriculture. Among the QoIs, it lies within the strobilurin chemical class.

Why does Pyraclostrobin 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 Pyraclostrobin?

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 Pyraclostrobin.