Gently used. Expect delivery in 2-3 weeks. Codice inventario libreria
Riassunto: Discusses several types of beneficial insects and how they are being raised by insectaries and purchased by farmers, theme park operators, and restaurant owners to protect food crops and decorative vegetation.
From School Library Journal:
Grade 3-5. The focus here is on beneficial insects?natural enemies of such crop-damaging pests as aphids, mites, caterpillars, beetles, etc. The text discusses the two categories of beneficials (predators and parasites) and describes some physical characteristics, feeding techniques, and prey of about a dozen representatives. Included are the ladybug, green lacewing, ichneumon wasp, tachinid fly, etc. The text also gives a brief historical survey of the agricultural industry's use of biological controls; outlines the operation of an insectary (a commercial supplier of beneficial insects); and offers some tips on observing insect behavior. Clear, color photographs accompany the text on about every other page; most are close-ups of the arthropods discussed. While most of the text in this well-organized introduction is clearly written, there are a couple of exceptions. For instance, although most of the scientific terms are defined in the text, the term "larva," or "larvae," is only defined in the glossary. Readers unfamiliar with the process of metamorphosis are likely to be confused. The text states, "Although they are lovely, butterflies and moths hatch from larvae." This is inaccurate. Caterpillars (larva) hatch from eggs and must undergo another stage of development, the pupal stage before emerging as adults. These errors, however, are minor flaws in an otherwise clear and straightforward text that will help fill a gap in the area of biological pest controls.?Karey Wehner, San Francisco Public Library
Copyright 1997 Reed Business Information, Inc.
Titolo: Insect Wars (First Books--Animals)
Casa editrice: Franklin Watts
Data di pubblicazione: 1997
Condizione libro: very good
Descrizione libro Franklin Watts. Condizione libro: Acceptable. Ex-library. Moderate wear. Light interior markings. Codice libro della libreria BOOK-0894-00862
Descrizione libro Scholastic Library Publishing. Library Binding. Condizione libro: Good. Ex-Library Book - will contain Library Markings. Book has some visible wear on the binding, cover, pages. Codice libro della libreria G0531202615I3N10
Descrizione libro Franklin Watts. Library Binding. Condizione libro: VERY GOOD. Very Good copy, cover and pages show some wear from reading and storage. Binding may have light creases. Lots of life left in these pages. Codice libro della libreria 2696675982
Descrizione libro Condizione libro: Very Good. Book Condition: Very Good. Codice libro della libreria 97805312026163.0
Descrizione libro Franklin Watts, 1997. Library Binding. Condizione libro: Good. Ships with Tracking Number! INTERNATIONAL WORLDWIDE Shipping available. May not contain Access Codes or Supplements. Buy with confidence, excellent customer service!. Codice libro della libreria 0531202615