Zafar Nazari
This research was conducted on potato plant in greenhouse of people friendship university of Russia in Moscow region in July 2024 at temperature of 20 – 27 C and optimal humidity of 70-80%. The aim of this study was to evaluate the efficiency of biological control of aphids by four bio-agents to know which one of these bio-agents has more biological efficiency on aphids. Parasite wasp, Lady beetle, Damsel and lacewings on potato. Interval of this research was two weeks and four bio-agents have been released on potato plant in greenhouse. The release rate of beo-agents is 100/10m2. Per day each these four bioagents Damsel bug, Ladybug, parasitic wasp and Green lacewing eliminated (42, 50, 47 and 45 respectively. The efficiency of bio-agents and the result of this study indicated, that these four bio-agents, Damsel bugs, Lady Beetles, parasitic wasps and Lacewings have controlled the population of aphids on potato plants 84%, 100%, 94% and 90% respectively. Among four bioagents Damsel bugs had the lease biological efficiency and Ladybug had the most biological efficiency in controlling of aphids on potato plants. In overall, they controlled 92% population of the potato aphids in greenhouses. The most effective biological control of potato aphids are these three beneficial insects such as ladybugs, parasitic wasps and lacewings.