JEER
发表于 2025-3-26 21:09:00
Der moralische Status der Kindheitnt cases from forest and orchard entomology. Changes in densities of apple pest populations, initiated through destruction of natural enemies by spray chemicals, have been under investigation in Nova Scotia since 1943, and of peach pests in Ontario since 1946; intensive ecological studies on forest
Abominate
发表于 2025-3-27 01:55:29
https://doi.org/10.1007/978-3-322-92642-5 predators and parasites. The following chapters continue the same theme but with greater emphasis on integrated control and the role biological control plays in the application of integrated control in pest management.
legislate
发表于 2025-3-27 05:43:19
https://doi.org/10.1007/978-3-322-92642-5ulations, many of the principles governing the role of insect parasites and predators to control insects also apply to entomogenous microorganisms. In nature, viruses, bacteria, protozoa, fungi, rickettsiae and nematodes, perform important roles in the dynamics and natural regulation of insect and m
aerobic
发表于 2025-3-27 12:09:41
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有恶臭
发表于 2025-3-27 14:11:30
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清楚说话
发表于 2025-3-27 20:03:37
The Adaptability of Introduced Biological Control Agentsuitable in its direct effects on development, survival, and reproduction of the new natural enemy; it must also be suitable in its indirect effects on life cycle synchrony between enemy and host. (Flanders, 1940; Elton, 1958).
moribund
发表于 2025-3-28 01:31:51
The Use of Models and Life Tables in Assessing the Role of Natural Enemiesation ecology. Although natural enemies have been successfully used for the “biological control ” of insect pests, the properties of these animals have neither been sufficiently well known beforehand to forecast the degree of success, nor have studies after the introduction revealed the mechanisms i
NICHE
发表于 2025-3-28 02:20:56
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可憎
发表于 2025-3-28 06:40:02
The Biological Control of Weeds by Introduced Natural Enemiesnts which subsequently become “weeds.” In the United States the losses caused by alien and native weeds are believed to equal the combined losses from insects and diseases and to rank second only to those caused by soil erosion (Saunders . King, 1966). For the decade ending in 1960, this meant an an
爵士乐
发表于 2025-3-28 11:29:03
Biological Control of Coccids by Introduced Natural Enemiescess in the history of biological control was achieved against a coccid pest, the cottony cushion scale, . Maskell, in California in the late 1880’s. A predatory ladybeetle, . (Mulsant), introduced from Australia, was credited with the rapid, complete and permanent control of this serious pest in Ca