Babich O. Nematodes complex of hops agrocenosis and its control in the Forest and Forest Steppe of Ukraine.

The specific structure and dynamics of number of a complex nematodes hops agrocenosis was investigated. It was shown, that long cultivation of hop in a monoculture caused formation a stable complex of parasitic kinds in soil. It was separated the most nocuous parasitic nematodes are called D. destructor and H. humulі. Character and degree of influence parasitic nematodes on hops was analysed. It was determined levels of harmful action D. destructor, H. humulі and a complex parasitic nematodes on hops. It was studied dynamics of nematodes amount during vegetation and the influence of weather conditions on them. Communication of kinds parasitic nematodes depending on a degree of defeat of fabrics was shown. Biological features of H. humulі development on hop and its harm are studied. Methods of revealing, the account and diagnosing of dominating kinds nematodes are advanced. Are developed balls scales of an estimation of a degree defeat plants and the technique of soil excavation is modified. The method of improvement roots from nematodes during carrying out springs fytosanitory inspection of plantations of hop is offered. Influence of mineral and organic fertilizers on a complex parasitic nematodes is studied. Optimum norms of chemical means of protection for monitoring number of a complex parasitic nematodes in ground were established. It was advanced recommendations of the proved and rational application of actions against nematodes.