astronomy

Paul DeBach

Paul DeBach is a astronomy 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 Paul DeBach rather than just read about it. In short: Paul Hevener DeBach (28 December 1914 – 15 February 1992) was an American entomologist who was a specialist on biological control. He wrote the influential book Biological Control by Natural Enemies first published in 1974 which went through several editions and helped in the development of the field of biological control.

Key takeaways

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

Reference excerpt

Paul Hevener DeBach (28 December 1914 – 15 February 1992) was an American entomologist who was a specialist on biological control. He wrote the influential book Biological Control by Natural Enemies first published in 1974 which went through several editions and helped in the development of the field of biological control. DeBach was born in Miles City, Montana but grew up in Southern California after his parents moved there. He went to Fairfax High School in Hollywood and then went to University of California, Los Angeles. After majoring in entomology he received a BA in 1938. He continued studies at Riverside in the Citrus Experiment Station under Harry Scott Smith and received a Ph.D. in 1940 on biological control. He joined the US Public Health Service in 1942 as an entomologist in the malaria control effort and later joined the US Department of Agriculture working on the control of the white fringed beetle. He returned to the Citrus Experiment Station at Riverside after World War II and worked there until retirement in 1983. DeBach was among the first entomologists to begin formal courses in biological control and wrote the first major textbook that defined the field, Biological Control by Natural Enemies (1974), a second edition of which was written along with David Rosen. He attempted to provide theoretical bases for the evaluation and choice of biological control agents. He was involved in measures to control the wooly whitefly in southern California in the 1970s using parasitic wasps. Similar work was carried out for the control. In the course of his use of parasitic wasps, he also worked on the taxonomy of the genus Aphytis. DeBach introduced the "Check method" which compares the effect of biological control agents against insecticide-based control and examined ecological issues involved in the establishment of biological control agents. DeBach edited a major work on the Biological Control of Insect Pests and Weeds (1964) and was involved in numerous international collaborations involved in pest management.

References

Worked examples

Example 1 — a first encounter with Paul DeBach

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

In research: Paul DeBach appears in astronomy 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 Paul DeBach 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: Paul DeBach is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1914 births, 1992 deaths, 20th-century American zoologists, so understanding it makes those chapters shorter.
In everyday life: Look for Paul DeBach 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 Paul DeBach in 20 minutes

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

Frequently asked questions

What is Paul DeBach in simple terms?

Why does Paul DeBach matter?

Because it connects several astronomy 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 Paul DeBach?

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 Paul DeBach.