Biological effectiveness of zeolite-containing tripoli in pest control of potatoes
Keywords:potato, zeolite-containing tripoli, foxglove aphid, Colorado potato beetle, the number of treatments, effectiveness
The biological effectiveness of the tripoli of the Hotynets Deposit (Orel region) was evaluated for the control of Colorado beetle Leptinotarsa decemlineata Say in the Belgorod region on potatoes and foxglove aphid Aulacorthum solany Kalt in a greenhouse. It was found that 4 % suspension of tripoli reduced the number of Colorado potato beetle larvae by 72.2–49.1 % for 14 days (using double treatment). Lower indices were obtained with the use of the preparation in 2 % concentration (70.2–37.8 % reduction in population). Despite its moderate effectiveness, the tripoli suppressed the pest below the economic threshold of harmfulness. Biological efficiency of tripoli in the combat against foxglove aphids after double treatment of potatoes with 4 % suspension was 98.0–95.0 % for 14 days. The tripoli, as a preparation of natural origin, is of interest for further study in systems of alternative insecticides to combat resistant populations of the Colorado potato beetle and foxglove aphid in primary potato seed production.