The effects of a synthetic insecticide and a mineral oil on alfalfa insect pests

  • Ivelina Mitkova Nikolova Institute of Forage Crops, General Vladimir Vazov str. 89, Pleven
  • Natalia Anastasova Georgieva Institute of Forage Crops, General Vladimir Vazov str. 89, Pleven
Keywords: Synthetic insecticides, Mineral oil, Reduced doses, Efficacy, Insect pests, Alfalfa,

Abstract


The effects of the synthetic insecticide Eforia 043 ZK (thiamethoxam+lambdacyhalothrin),
applied alone and at 1/5 and 2/5 reduced doses in a mix with the mineral
oil Akarzin, on Tychius flavus Beck. (Coleoptera: Curculionidae), Adelphocoris lineolatus
Goeze (Hemiptera: Miridae), Acyrthosiphon pisum Harr. (Hemiptera: Aphididae), harmful
thrips (Thysanoptera) and cicadas (Hemiptera: suborder Auchenorrhyncha) were studied.
The efficacy of Eforia (applied alone and in reduced doses) was significantly higher
against A. pisum, followed by A. lineolatus and harmful thrips, compared to cicadas. The
insecticidal action of Akarzin had a better protective effect against A. pisum, followed
by A. lineolatus, in comparison with thrips and cicadas. Combined application of the
broad-spectrum insecticide Eforia provided good control against insect pests. The mix
of Eforia’s reduced 1/5 dose with the mineral oil showed the highest toxicity throughout
the reporting period. Eforia applied at the reduced dose of 2/5 with Akarzin followed
in efficacy. A synergistic effect was observed in combinations and was defined as subadditive
synergism. Reduced dosage of Eforia and decrease in negative environmental
impact of the plant protection products is a friendly approach to integrated pest control.
It is important to apply innovative formulations of plant protection products that are safer
both for plants and the environment.

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Published
2018/12/29
Section
Original Scientific Paper