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Looking for protection solutions against aphids

Myzus persicae Sulzer (Hemiptera: Aphididae) is a pivotal pest affecting various vegetables, fruits, crops, and ornamentals.

The primary M. persicae management strategy involves insecticide use. In this study, the toxicity and efficacy of bifenthrin, fenitrothion, fosthiazate, acetamiprid, spirotetramat, afidopyropen, and flonicamid against M. persicae were evaluated under laboratory and greenhouse conditions using the leaf dip method. Laboratory bioassay results revealed that M. persicae exhibited susceptibility to moderate resistance levels for bifenthrin [resistance ratio (RR): 3.00–21.50], fenitrothion (3.13–25.31), fosthiazate (3.00–20.00), and acetamiprid (2.00–14.50), as well as susceptibility to low resistance levels for spirotetramat (0.75 to 6.63). Additionally, M. persicae was susceptible to flonicamid (0.31–1.72) and afidopyropen (0.67–2.00).

Furthermore, laboratory bioassays revealed that the Al-Dhabia M. persicae field population showed the highest resistance levels to all tested insecticides compared with other tested field populations, which guided the examination of insecticide field performance under greenhouse conditions. In the greenhouse, most insecticides demonstrated high efficacy (>90%) against M. persicae with enduring effects, except for bifenthrin, which began to lose effectiveness 10 days post-application. In conclusion, M. persicae displayed overall susceptibility to most tested chemical classes, and the prolonged efficacy of these insecticides in the field reinforces their effectiveness in controlling this pest species. To maintain this control level, the registration of novel insecticides such as flonicamid and afidopyropen in Saudi Arabia is imperative, expanding the repertoire of effective chemical tools for M. persicae control.

Additionally, a rotational approach to using all effective chemical classes is crucial to preventing or delaying resistance development in M. persicae.

Sabra, S.G.; Abbas, N.; Hafez, A.M. Evaluation of Insecticide Toxicity and Field Performance Against Myzus persicae (Hemiptera: Aphididae) in Laboratory and Greenhouse Conditions. Agronomy 2025, 15, 280. https://doi.org/10.3390/agronomy15020280

Source: MDPI

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