biology

Hoplolaimus galeatus

Hoplolaimus galeatus 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 Hoplolaimus galeatus rather than just read about it. In short: Hoplolaimus galeatus (Crown-headed lance nematode) is a plant pathogenic nematode. History Hoplolaimus galeatus was discovered by Nathan Cobb in 1913, originally named Nemochus galeatus.

Key takeaways

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

Reference excerpt

Hoplolaimus galeatus (Crown-headed lance nematode) is a plant pathogenic nematode.

History Hoplolaimus galeatus was discovered by Nathan Cobb in 1913, originally named Nemochus galeatus. In 1935 Nemochus galeatus was reclassified as Hoplolaimus galeatus and described, in detail, by Thorne.

Distribution H. galeatus Can be found worldwide in North America, Sumatra, Central and South America, India and Tanzania. In the United States H. galeatus has been reported along the east coast, along the Mississippi river, Colorado and Southern California.

Morphology H. galeatus is described as being a relatively large nematode (1.1–15.mm) with a large heavily defined cephalic framework, including a large stylet with tulip shaped knobs. The nematode has a cuticle with 4–6 layers. The lips are offset with 4–5 annules, which are divided into tile-like structures. The nematodes body is slightly curved when relaxed. Females have two ovaries which overlap the spermatheca. The vulva is found near the center of the body and the rectum near the tip of the tail. Males are smaller than the female, have an arcuate spicules, gubernaculum with titillate and a broad striated bursa.

Life cycle and reproduction Not much is known with regards to the lifecycle of H. galeatus.

Host parasite relationship H. galeatus has a very wide host range. While it is most important on turfgrass, it is known to infect; alfalfa, apple, beans, bananas, cabbage, chrysanthemums, clover, corn, cotton, oak, peanuts, peas, pine, sweet potatoes, sycamore, and wheat. H. galeatus is a migratory endoparasitic nematode but can also be found feeding semi-endoparasitically. Due to the migratory nature of the nematode, large necrotic lesions form in the plants root system as the nematode moves and feeds.

Management Chemical treatments are not as effective on H. galeatus as they are on other nematodes. Pre-planting dips may be an effective way to ensure that turf being planted does not carry over nematodes to the planting site. There are also many cultural practices that can reduce or prevent the population of H. galeatus. Some of these practices include; adequate watering, limiting activity on the turf, making certain the soil is aerated, applying fertilizers and avoidance of shaded areas when planting.

References

See also List of soybean diseases Hoplolaimus magnistylus Hoplolaimus columbus

External links Nemaplex, University of California - Hoplalaimus galeatus

Worked examples

Example 1 — a first encounter with Hoplolaimus galeatus

Start with the simplest possible case. Write down what Hoplolaimus galeatus 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 Hoplolaimus galeatus 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 Hoplolaimus galeatus 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 Hoplolaimus galeatus

In research: Hoplolaimus galeatus 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 Hoplolaimus galeatus 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: Hoplolaimus galeatus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Agricultural pest nematodes, Food plant pathogens and diseases, Nematodes described in 1935, so understanding it makes those chapters shorter.
In everyday life: Look for Hoplolaimus galeatus 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 Hoplolaimus galeatus in 20 minutes

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

Frequently asked questions

What is Hoplolaimus galeatus in simple terms?

Hoplolaimus galeatus (Crown-headed lance nematode) is a plant pathogenic nematode. History Hoplolaimus galeatus was discovered by Nathan Cobb in 1913, originally named Nemochus galeatus.

Why does Hoplolaimus galeatus 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 Hoplolaimus galeatus?

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 Hoplolaimus galeatus.