The efficacy of European fruit lecanium, Parthenolecanium corni (Bouché, 1844) control using natural products

Abstract

European fruit lecanium, Parthenolecanium corni (Bouché, 1844) is among the leading worldwide pests of fruits such as plums, currants, jostaberry, grapevine and many others. This study is focused on testing the effectiveness of natural insecticide treatments compared with conventional insecticides on overwintering nymphs of the European fruit lecanium. In February of 2017, two experiments were conducted under laboratory conditions. The tested products were Boundary SW<sup>®</sup> (plant extract), Konflic<sup>®</sup> (plant extract), Ekol<sup>®</sup> (canola oil) and a tank-mix of Ekol<sup>®</sup> + Reldan 22<sup>®</sup> (canola oil and chlorpyrifos-methyl) as a chemical standard. The most effective product tested was the chemical standard tank-mix of Ekol<sup>®</sup> and Reldan 22<sup>®</sup>, which was 100% effective in all experiments. High efficiency was also achieved with Ekol<sup>®</sup> (canola oil) in high concentrations. We can summarize, that using canola oil in high concentration has almost the same effect as the chemical standard. Using canola oil against European fruit lecanium meets the principles of Integrated Pest Management (IPM) and also the need to design cropping systems that are less dependent on synthetic pesticides.

Integrated Control of Scales on Highbush Blueberry in Poland

“…The mode of action for many oils is suffocation and water loss [54], and therefore they are unlikely to induce resistance in insect populations [55]. A canola oil treatment resulted in very high efficacy with concentrated sprays (90% with 20 L/ha and 99% with 30 L/ha), similar to that obtained with a tank of the same oil mix (1 L/ha) with chlorpyrifos-methyl [56]. Paraffin oil reduced the number of P. corni larvae by an average of about 80% in trials under different pedo-climatic conditions [57].…”

“…Other non-synthetic substances suitable for scale control under organic management of highbush blueberries were reported to have different efficacy. A mixture of vegetal amino acids and fatty acids or treatment with Quassia amara extract 50% and potassium soap showed insufficient efficacy [56]. On the other hand, a product based on polysaccharides and also containing chitosan showed a satisfactory level of efficacy [4].…”

An Evaluation of Insecticidal Trunk Injections for the Control of the European Cherry Fruit Fly Rhagoletis cerasi L. (Diptera: Tephritidae)

“…Abbott's formula was used to evaluate insecticidal effects. Abbott's formula is commonly used to calculate plant protection product efficacy [27].…”