biology

Phacidiopycnis washingtonensis

Phacidiopycnis washingtonensis is a biology 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 Phacidiopycnis washingtonensis rather than just read about it. In short: Phacidiopycnis washingtonensis, is a species of fungus in the family Phacidiaceae, first described by C.L. Xiao & J.D.

Key takeaways

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

Reference excerpt

Phacidiopycnis washingtonensis, is a species of fungus in the family Phacidiaceae, first described by C.L. Xiao & J.D. Rogers in 2005. It is a weak orchard pathogen and a cause of rubbery rot, also known as speck rot, in postharvest apples. First described in North Germany, it affects several apple varieties, including commercially important Jonagold and Elstar. Losses caused by P. washingtonensis during storage are usually below 1% but can reach 5–10% of apples. P. washingtonensis is a weak canker pathogen to apple trees, but while commercial trees in orchards don't seem to be at risk, crabapple pollinators can be susceptible. The fungus causes small black dots (fruiting bodies) to form on infected twigs and tree branches. Fruiting bodies contain millions of spores which serve as the source for fruit infection. Speck rot in postharvest is characterized by an initial light brown skin discoloration that progresses to a more blackish skin discoloration, with a firm rubbery texture.

References

External links Phacidiopycnis washingtonensis in Index Fungorum.

Illustrations

Worked examples

Example 1 — a first encounter with Phacidiopycnis washingtonensis

Start with the simplest possible case. Write down what Phacidiopycnis washingtonensis claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Phacidiopycnis washingtonensis 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 Phacidiopycnis washingtonensis 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 Phacidiopycnis washingtonensis

In research: Phacidiopycnis washingtonensis appears in biology 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 Phacidiopycnis washingtonensis 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: Phacidiopycnis washingtonensis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Apple tree diseases, Fungal plant pathogens and diseases, Fungi described in 2005, so understanding it makes those chapters shorter.
In everyday life: Look for Phacidiopycnis washingtonensis 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 Phacidiopycnis washingtonensis in 20 minutes

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

Frequently asked questions

What is Phacidiopycnis washingtonensis in simple terms?

Phacidiopycnis washingtonensis, is a species of fungus in the family Phacidiaceae, first described by C.L. Xiao & J.D.

Why does Phacidiopycnis washingtonensis matter?

Because it connects several biology 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 Phacidiopycnis washingtonensis?

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 Phacidiopycnis washingtonensis.