As a result, in order to respond economic and environmental effects of current farming, demand for sustainable agriculture development increased intensely  and because of extensive problems from application of chemical methods, pests management methods have possessed specific position with an emphasis on biologic control and organic agriculture .
Effect of socio-economical factors on accepting the methods of biologic control in rice field, available in site: www.
In 1902, Congress passed the Biologic Control
Act in response to
Insect-pathogenic nematodes are thought to be harmless to vertebrates and are used in horticulture for biologic control
of insects (6).
Maleki Ziarati  investigated the biologic control of Meloidogyne javanica (Trube) Chitwood by Trichoderma harzianum rifai fungi in greenhouse, and concluded that T.
Evaluation of Trichoderma isolates for biologic control of Phytophthoradrechsleri disease in greenhouse.
Concern is growing about the use of Burkholderia cepacia, a bacterial phytopathogen, for the biologic control
of seedling diseases (9).
Scientists chase to superseded methods that one of this method is use from biologic control agents that, is in nature and human achieve that with his technical knowledge.
Checking the behavior of plant or studying their relation signs with other creatures is one of the biologic control methods in agriculture's products.
has been investigated with Bacillus sphaericus and thuringiensis in larval breeding pools.
Among the topics discussed by this volume's 33 papers are the importance of ecological and phylogenetic conditions for the occurrence and frequency of sexual cannibalism, responses of humid tropical trees to rising carbon dioxide, the role of propagule pressure in biological invasions, nongenetic inheritance and its evolutionary implications, spontaneous mutation accumulation studies in evolutionary genetics, geologic and biologic controls
on the evolution of reefs, molecular estimation of dispersal for ecology and population genetics, the origin and subsequent diversification of the angiosperm flower, the evolutionary genetics of emerging viruses, belowground herbivory and plant defenses, genetic consequences of range expansions, and the role of animal pollination in plant speciation.
Studies show that over a period of three-to-six months, this biologic controls
psoriasis in a large percentage of patients.