The laboratory estimation of essential oils as biological methods against black cherry aphids M. cerasi

M.A.S. Eisa¹, O. Matsera¹²* and Ľ. Cagáň¹

¹Plant protection Department, Institute of Agronomical Sciences, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, Tr. A. Hlinku, 2, SK94901 Nitra, Slovakia
²Agriculture, Soil Science and Agrochemistry Department, Agronomy and Forestry Faculty, Vinnytsia National Agrarian University, Sonyacha Str., 3, UA21000 Vinnytsia, Ukraine
*Correspondence: matsera.olga.vnau@gmail.com

Abstract:

Plants’ essential oils play a considerable role in the plant integrated protection systems against harmful insects. Therefore the aim of our study was to find the potential repellency and toxicity effects of essential oils (EOs) from Allium sativum L., Ocimum basilicum L., Lavandula angustifolia Mill, Eucalyptus globulus, Labill and Curcuma longa L., and two chemical substances DEET (N, N-diethyl-3-methylbenzamide) and 2-Undecanone on the black cherry aphids Myzus cerasi. Repellent peculiarities were evaluated at five different concentrations: 0.3%, 0.6%, 0.9%, 1.2% and 1.5%, with 4 replications at the interim of 15 and 30 minutes for an olfactometer test and mortality was evaluated after 2, 6 and 24 hours for insecticidal activity test. The repellent index was most influenced by the concentration of essential oil; the percentage of influence was 64%. At the same time, the highest repellency index 95% was achieved at a concentration of 1.5% when using essential oils of A. sativum and E. globulus, as well as when using 2-Undecanone within 30 minutes of waiting. A contact toxicity (mortality) test in Petri dishes showed efficacy for all tested oils and chemicals after a 6-hour treatment period. The lowest concentration that ensured 100% insect mortality was 0.9% when using E. globulus essential oil. The lowest lethal concentration (LC₅₀) value of 0.00240mL/10 mL was obtained with O. basilicum oil and the lowest LC₉₈ value of 0.28209mL/10 mL was obtained with E. globulus oil after a 6-hour treatment period.

Key words:

Myzus cerasi, Olfactometer, plant protection, repellent peculiarities, toxicity

Pheromone research in Estonia

I. Liblikas and S. Kuusik

Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences,Kreutzwaldi St. 64, 51014 Tartu, Estonia; e-mail: ilmel@kth.se, ilme.liblikas@eau.ee

Abstract:

The pheromone screening of nineteen insect species was conducted in different habitats and geographical regions of Estonia. The purpose of this screening was to measure the population density of selected insects to sort out species suitable for environmental monitoring. The other research objective was to standardize the pheromone materials for plant protection as alternative approaches to the use of conventional pesticides. To monitor the changes in environment Archips podana, Hedya nubiferana, Choristoneura diversana, Enarmonia formosana, Tortrix viridana, Archips xylosteana and Cerapteryx graminis showed great potential. In fruit gardens the pheromone kit for codling moth Cydia pomonella is recommended. The pheromone dispenser for Currant shoot borer, Lampronia capitella, is the first of its kind. in the world.The old-fashioned Russian-made substrate was successfully replaced by Hevea’s rubber-and silicone-based materials. Our laboratory is ready for lab-scale production of all tested dispensers.

Key words: