Civolani Stefano, Boselli Mauro, Radicetti Emanuele, Bernacchia Giovanni
Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Borsari 46, 44121 Ferrara, Italy.
Independent Researcher in Applied Entomology, Pianoro, 40065 Bologna, Italy.
Insects. 2023 May 24;14(6):491. doi: 10.3390/insects14060491.
In recent years, the control of pear psyllid in northern Italy has not been particularly problematic, due to the presence of two insecticides (abamectin and spirotetramat) specifically for this pest, and due to the adoption of integrated pest management. However, the withdrawal of these two specific insecticides is imminent and, therefore, it has become necessary to find alternative control tools. More recently, potassium bicarbonate, known for its fungistatic activity against many phytopathogenic fungi, has also shown some activity against some insect pests. In the present study, the efficacy and possible phytotoxicity of potassium bicarbonate were tested in two field trials on second generation by spraying two different salt concentrations (5 and 7 kg ha), with or without polyethylene glycol as an adjuvant. Spirotetramat was used as a commercial reference. The results showed that potassium bicarbonate could positively control the number of juvenile forms (with a mortality percentage of up to 89% at the infestation peak), even though spirotetramat was still more effective. Therefore, potassium bicarbonate appears to be a sustainable integrated tool for psyllid control, especially in the wake of the imminent withdrawal of spirotetramat and other insecticides currently used on this pest.
近年来，由于有两种专门针对这种害虫的杀虫剂（阿维菌素和螺虫乙酯），以及采用了综合虫害管理，意大利北部梨木虱的防治并没有特别大的问题。然而，这两种特定杀虫剂即将退市，因此，有必要寻找替代的防治工具。最近，以其对多种植物病原真菌的抑菌活性而闻名的碳酸氢钾，也显示出对一些害虫有一定活性。在本研究中，通过喷洒两种不同的盐浓度（5和7千克/公顷），在有或没有聚乙二醇作为助剂的情况下，对第二代进行了两次田间试验，测试了碳酸氢钾的功效和可能的植物毒性。螺虫乙酯用作商业对照。结果表明，碳酸氢钾可以有效地控制若虫数量（在虫害高峰期死亡率高达89%），尽管螺虫乙酯仍然更有效。因此，碳酸氢钾似乎是一种可持续的综合防治梨木虱的工具，特别是在螺虫乙酯和目前用于防治这种害虫的其他杀虫剂即将退市的情况下。
