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Original scientific paper

https://doi.org/10.18047/poljo.28.1.1

Comparative Effect of Different Insecticides and Processed Kaolin on Cacopsylla pyri L. Population Reduction

Vesna Tomaš orcid id orcid.org/0000-0001-9533-7674 ; Agricultural Institute Osijek, Južno predgrađe 17, 31000 Osijek, Croatia
Ines Mihaljević ; Agricultural Institute Osijek, Južno predgrađe 17, 31000 Osijek, Croatia
Dominik Vuković ; Agricultural Institute Osijek, Južno predgrađe 17, 31000 Osijek, Croatia
Marija Viljevac Vuletić orcid id orcid.org/0000-0001-8792-641X ; Agricultural Institute Osijek, Južno predgrađe 17, 31000 Osijek, Croatia
Vlatko Galić orcid id orcid.org/0000-0002-5191-2953 ; Agricultural Institute Osijek, Južno predgrađe 17, 31000 Osijek, Croatia
Viktor Tomeš ; Bioinspekt Ltd., Đakovština 2, 31000 Osijek, Croatia
Krunoslav Brus ; Croatian Agency for Agriculture and Food, Vinkovačka cesta 63 c, 31000 Osijek, Croatia
Zvonimir Zdunić ; Agricultural Institute Osijek, Južno predgrađe 17, 31000 Osijek, Croatia


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Abstract

Cacopsylla pyri L. (Hemiptera: Psyllidae) is one of the most serious economic pear pests in Eastern Croatia. Previous methods of pear control in the Republic of Croatia have led to the development of an insect population resistan to certain active ingredients. The objectives of this two-year study were to determine the optimal number of treatments for psylla control based on the monitoring of pest life cycle and to determine the effectiveness of processed kaolin in controlling the pear psylla in comparison with other chemical insecticides in four different treatments (T1. IPM-integrated protection program – diflubenzuron, spirotetramat, abamectin, acetamprid; T2. acrinatrin + abamectin, T3. kaolin clay, T4. control treatment). The research was conducted in 2017 and 2018 in a six-year-old experimental pear
orchard on three varieties (Williams, Conference, and Abate Fetel). Monitoring of the pest population and its development was performed by visual inspection on two one-year shoots per tree of each variety in all replicates. The T1 treatment demonstrated the highest efficiency, between 84-95%, depending on the year, while the kaolin treatment had the lowest one, but it varied greatly from one year to the other (37-71%).

Keywords

efficiency, kaolin, pear psylla, plant protection, integrated pest management, pyrethroids

Hrčak ID:

280022

URI

https://hrcak.srce.hr/280022

Article data in other languages: croatian

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