Agro biological significance of economic damage threshold of parasitic nematodes plant complexes of the genus Meloidogyne vegetable crops from protected land

Abstract

Economic damage thresholds (EDT) is not a constant value for different areas or districts in generalizing experimental data related to EDT, but it requires a periodic finding of those values in making decisions about the degree of affection and taking measures to combat Meloidogyne in vegetable plants growing in various media. As a result of our investigations possibility forecasting crop loss caused by parasitic nematodes of plant have certain priorities compared with forecast losses caused by other pests. This is explained primarily by the limited mobility of populations of plant nematodes of the genus Meloidogyne and sedentary Heterodera at level of biotope, and the influence of environmental factors in determining quantitative indices over by them. This variation persists and extends varieties and hybrids of vegetable crops, the impact species of parasitic nematodes plant and of new races of vegetable crops evolved in different agro recovered and routed in protected or open land.