science

Jesse Roy Christie

Jesse Roy Christie is a science 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 Jesse Roy Christie rather than just read about it. In short: Jesse Roy Christie (1889 – 21 April 1978) was an American nematologist and plant pathologist. Career In 1922, shortly after leaving the army, Jesse Christie joined the group of N.

Key takeaways

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

Reference excerpt

Jesse Roy Christie (1889 – 21 April 1978) was an American nematologist and plant pathologist.

Career In 1922, shortly after leaving the army, Jesse Christie joined the group of N. A. Cobb at the Office of Nematology in Washington D.C., part of the U.S. Department of Agriculture. Between 1923 and 1937 he published 19 papers on the nematode parasites of insects, as well as contributed to a 129-page chapter in Benjamin Goodwin Chitwood's Introduction to Nematology. While working at Woods Hole with N. A. Cobb, he also discovered the life cycle of the nematode parasite on grasshoppers Mermis subnigrescens. Between 1927 and 1930, Christie joined the Helminthological Society of Washington as a secretary, and was appointed president in 1930. After N.A. Cobb's death in 1932, Christie had to abandon his project on insect parasites and moved to Washington, D.C. Between 1932 and 1947 he served as an editor of "Proceedings of the Helminthological Society of Washington", and in 1956 was elected as a life member. In 1964, Christie received an anniversary award from the Helminthological Society of Washington. In 1940, Christie moved to Beltsville, Maryland, and began working on plant parasitic nematodes. As part of the war effort. he evaluated chemicals for nematode control. Through this line of work he identified ethylene dibromide as a compound subsequently widely used for nematode control. His extensive work on plant parasites led to the publication of 75 papers, as well as the book Plant Nematodes Their Bionomics And Control (1959).

In 1948, Christie moved to Sanford, Florida, where he worked together with V. G. Perry on stubby-root and sting nematode parasites on plants. He continued working on plant parasitic nematodes for the rest of his career. In 1953, Christie retired as a Senior Nematologist from the USDA, and left for Indonesia to study the nematodes in the Spice Islands. His research there focused on burrowing nematodes on pepper and the rice root nematode Hirschmanniella oryzae. He published his discoveries at the Spice Islands in a nine-part series in Nematology Newsletter, titled Hunting Nematodes in The Spice Islands. Following his trip to Indonesia, Christie joined the University of Florida in 1954, where he founded the Nematology Department and engaged in teaching as well as research and applications. He retired from this position in 1960.

Awards and acknowledgements Charter member of the American Society of Parasitologists Fellow in the American Phytopathological Society (1972) Honorary member of the Society of Nematologists, Soil & Crop Science Society of Florida Honorary member of the Florida Nematology Forum Florida Fruit and Vegetable Association Research Award (1957) Sigma Delta Faculty award (1961)

References

Worked examples

Example 1 — a first encounter with Jesse Roy Christie

Start with the simplest possible case. Write down what Jesse Roy Christie claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Jesse Roy Christie 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 Jesse Roy Christie 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 Jesse Roy Christie

In research: Jesse Roy Christie appears in science 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 Jesse Roy Christie 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: Jesse Roy Christie is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1889 births, 1978 deaths, American phytopathologists, so understanding it makes those chapters shorter.
In everyday life: Look for Jesse Roy Christie 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 Jesse Roy Christie in 20 minutes

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

Frequently asked questions

What is Jesse Roy Christie in simple terms?

Jesse Roy Christie (1889 – 21 April 1978) was an American nematologist and plant pathologist. Career In 1922, shortly after leaving the army, Jesse Christie joined the group of N.

Why does Jesse Roy Christie matter?

Because it connects several science 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 Jesse Roy Christie?

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 Jesse Roy Christie.