Efficacy evaluation of two different insecticides for the control of the seabuckthorn fruit fly (Ragoletis batava) Project leader Laura Ozoliņa-Pole Team of project Duration 2019 - 2019 Research focus 4. Development and adaptation of technologies for obtaining high-value agricultural and forest products, as well as in veterinary medicine Source of funding Ministry of Agriculture projects Project partners Latvian Plant Protection Research Centre (LAAPC)Dana Blese Description of project The aim of research To test the efficacy of different insecticides and spray regimes for the control of the seabuckthorn fruit fly in seabuckthorn plantations The tasks of project: To monitor seabuckthorn fruit fly before sprayingTo set up a field trial in accordance with EPPO guidelinesTo test the efficacy of two different plant protection products for the control of seabuckthorn fruit fly and compare with the neonicotinoid group insecticide used so farTo test the effectiveness of different spray regimes for the control of seabuckthorn fruit fly Results The trial was set up in a plantation of the buckthorn cultivar ‘Botanicheskaja Lubitelskaja’ in the Auce region, in eight treatments with four replications. The trial included the test insecticides Tracer 480 (a.i. spinosad), Mospilan 20 SG (a.i. acetamiprid), GF-120 (a.i. spinosad), Calypso 480 SC was used as the reference product. Control (untreated) plots were located both within and outside the trial in a single randomisation block. Monitoring using yellow glue traps with and without attractants was carried out to determine the timing of the first spray and to detect the dynamics of the seabuckthorn fruit fly. The efficacy of the insecticide Mospilan 20 SG (sprayed 2 times with an interval of 22 days) was high (larval control < 90% and damage control < 75%), not significantly different from the reference product Calypso 480 SC with identical spray regimes. In the treatment where Mospilan 20 SG was sprayed only once, the efficacy was lower (60%). The spinosad-containing test products Tracer 480 and GF-120 showed overall lower and insufficient efficacy (47 to 57.7% depending on the spray regimen) compared to the neonicotinoid group insecticides Mospilan 20 SG and Calypso 480 SC.
