Nevmerzhitska O. Diseases of sugar-beet caused by fungus Fusarium and Rhizoctonia and use of Trichoderma hamatum (Bonordem) and other biological agents for the control of their progress.

3. Research of biological characteristics of causative agents that cause Pythium disease of beet and rot of root crops ascertained that the most active causative agents of the said diseases are F. oxysproum and R. solani. Evaluation of modern hybrids showed that following hybrids are relatively resistant: Leopard, Shanon, Bakara, Olesya, Tinker, Baltica, etc. Forest cover of 33-55 year old mixed forests of Zhytomyr and neighboring districts presents 210 isolates of fungus, that belonged to 7 genus - Penicillium, Fusarium, Aureobasidium, Aspergillus, Verticillium, Trichoderma and Cladosporium. The most numerous are Penicillium (25 %), Fusarium (22 %), Aspergillus (19 %), Trichoderma (12 %). We have done comparative evaluation of the efficiency of application of strain T. hamatum ZH-6 (Number in National collection of strains of microorganisms - IMB F - 100060) for pretreatment of seeds in comparison to industrial biological preparation Hetomic and Trichodermin for treatment of sugar-beet seeds. Strain T. hamatum ZH-6 is highly competitive with industrial preparation due to its effectiveness (similarity of seeds, initial growth, affect by Pythium disease). According to the results of estimation of effectiveness of various norms of application of T. hamatum ZH-6 into soil on nature and infection backgrounds of F. oxysporum it was ascertained that optimal consumption rate of 35 kg/h allowed to decrease quantity of affected crops, increase harvest yield of root crops and sugar harvesting. Study of application of strain T. hamatum ZH-6 during operational testing showed that offered techniques allowed to receive net profit of 12026 hrn/h that 1724 hrn/h more in comparison to standard, that increased harvest yield to 5.1 t/h. Profitability of the production: 155,6 %.