EFFECT OF A NEEM PREPARATION ON REPRODUCTION OFTHE NEMATODE GLOBODERA ROSTOCHIENSIS ANDGROWTH OF POTATO

An experiment was conducted under glasshouse conditions to testthe effects of neem-based product in the form of drenches and potato tubertreatments on the growth of potato and population density of the potato cystnematode globodera rostochiensis. the soil applications of the biopreparationimproved the plant growth and yield of potato, being greatest with 1% neem azal.the biggest increase in the yield occurred in the oxamyl application (15.8%). thebiopreparation in concentrations from 0.2% to 1% increased the yield of potatoesfrom 0.3% to 9.7% compared to the untreated inoculated control. the soilapplication was relatively more effective in increasing of the yield (0.3%-9.7%)than the potato tuber treatments (0.3%-2.3%). the nematode reproduction wasreduced 83.3% with oxamyl and from 59.8% to 71.0% with neem azaltreatments.