Abstract:
The toxicity of bulb extract of garlic, Allium sativum L. (Amaryllidaceae), the leaf extract of tobacco, Nicotiana tabacum L. (Solanaceae), soft soap and the mixtures of soft soap with the garlic and tobacco extracts on Polyphagotarsonemus latus (Banks, 1904) (Acari: Tarsonemidae) were investigated in the Plant Protection Department of Ordu University between 2014 and 2018 under controlled conditions. The ovicidal and adulticidal effects were tested against 0-24-h-old eggs and newly emerged adult females (1-2 days old) of P. latus, respectively at five concentrations of each extract. The efficacies of the same solutions in controlling the P. latus population were investigated on potted Barbunia bean, Phaseolus vulgaris L., 1753 cv. Barbunia (Fabaceae) plants in a climatic room as well. The results demonstrated that the soft soap and the garlic bulb extract+soft soap mixture are promising for controlling P. latus. The ovicidal effects of soap at 10% and garlic+soap mixture at 20% were 100% and 97.8%, respectively. Additionally, the adulticidal effects of soap at 7.5 and 10% and garlic+soap mixture at 10% were not significantly different and ranged between 90-100%. Also, the soap (10%) and garlic+soap (20%) treatments were able to keep the mite population on bean plants below the economic threshold for 1 week.