Evaluation of the acaricidal activity of 63 commercialized pesticides against Haemaphysalis longicornis (Acari: Ixodidae)

Abstract

The acaricidal activity and residual effects of 63 commercialized pesticides against the Cheongju strain of Haemaphysalis longicornis in Korea were examined. Twenty‐two pesticides (4 carbamates, 5 organophosphates, 10 pyrethroids, 1 amitraz, 1 diamide, and 1 unclassified pesticide) caused greater than 80% mortality in H. longicornis adults under laboratory conditions using the spray method. These 22 pesticides were used to treat grassland under field conditions for investigation of the residual effects, and 100% mortality in H. longicornis adults was observed with all the carbamates (carbosulfan, benfuracarb, fenobucarb, and carbaryl) and γ‐cyhalothrin after 3 days of pesticide treatment. γ‐Cyhalothrin exhibited 56.7% mortality after 10 days of treatment, which was the longest residual effect of treated grass on H. longicornis adults. With regard to the residual effects on H. longicornis under field conditions, most of the 22 pesticides exhibited higher mortality in nymphs than in adults. In particular, benfuracarb exhibited 96.7% acaricidal activity until 10 days after treatment. These results indicate that carbamates are highly likely to be available under field conditions and, based on this preliminary data, could be used for the control of H. longicornis adults and nymphs.

Phylogenomics of Tick Inward Rectifier Potassium Channels and Their Potential as Targets to Innovate Control Technologies

“…Curiously, flonicamid showed little efficacy against Ha. longicornis after spray application at 50 ppm concentration ( Park et al., 2019 ). This lack of activity is likely due to a failure to inhibit the Ha.…”

Baseline susceptibility of Haemaphysalis longicornis to organophosphate, carbamate, and pyrethroid acaricides

“…Susceptibility data that are needed for resistance determination are limited in H. longicornis . In vitro studies using commercial acaricides on H. longicornis indicate that pyrethroids, carbamates, and organophosphates are generally effective 26–29 . However, lethal concentrations (LCs) and discriminating concentrations (DCs) for H. longicornis have not been established for any of these pesticide groups.…”

“…In vitro studies using commercial acaricides on H. longicornis indicate that pyrethroids, carbamates, and organophosphates are generally effective. [26][27][28][29] However, lethal concentrations (LCs) and discriminating concentrations (DCs) for H. longicornis have not been established for any of these pesticide groups. Pesticide resistance in H. longicornis has not been formally recognized; however, genetic mechanisms for pyrethroid and OP detoxification, including cytochrome P-450 monooxygenases, glutathione S-transferases, and ATP-binding cassette transporters have been identified in this species.…”

Acaricidal activity of Cinnamomum cassia (Chinese cinnamon) against the tick Haemaphysalis longicornis is linked to its content of (E)-cinnamaldehyde

“…Various control strategies, including the use of synthetic pesticides, have been developed to control tick species including H . longicornis [ 5 ]. However, the demand for effective and safe alternative pesticides is increasing due to the adverse effects, including environmental pollution and undesirable effects on non-target species, associated with the intensive and injudicious use of synthetic pesticides [ 6 ].…”