At the present time, the position of modern integrated protection of forests menaced by pests is increasing in importance, and not just because of demands on the quality and quantity of wood being raised. It is steadily becoming more necessary to revise the consequences of the often imprudent, although sometimes seemingly effective, chemical control in forest biocoenosis. Additionally, harmful insects are becoming more resistant to pesticides and so increasing the chance of accidentally jeopardizing plants. In the future concept of integrated forest pest control, we may therefore expect the population density of many harmful species to be regulated to a larger degree by biological control. This book discusses the economic importance of insects beneficial to the protection of forest trees, and provides information on their biology. The text and the pictorial section to this book divide beneficial insects into predators and parasites. The first section is devoted to predators, particularly ants, the most frequent insect species found in forests. Scale bugs, groups of predatory beetles, Neuroptera and Diptera are also mentioned. The second part describes parasitic insects.
Publisher: Elsevier Science & Technology