Title

Enhancement of insecticides against codling moth (Lepidoptera: Tortricidae) with L-aspartate in laboratory and field experiments

Document Type

Article

Publication Date

2014

Abstract

The idea of enhancing insecticide efficacy against phytophagous insects with feeding stimulators was proposed as early as the 1960s, and a number of insect feeding stimulators based on sugars, molasses, and cottonseed extracts, biologically active at relatively high (5% and higher) concentrations, have been advocated. Here, we show that an acidic amino acid, l-aspartate, stimulates feeding in codling moth neonates at much lower concentrations and acts as an effective tank-mixed additive for increasing efficacy of insecticides, reducing fruit damage, and increasing yield of the fruit. In laboratory experiments, 1 mg/ml l-aspartate increased foliage consumption by 40"“60% and, when added to Assail 30 SG, Baythroid XL, Delegate WG, or Carbaryl 80S, maintained its feeding stimulatory properties and reduced LD50s by ≈10 times. In a 3-yr field trial, addition of L-aspartate to the aforementioned insecticides at 395 g/ha reduced fruit damage from ≈6%, on average to <1% for first-generation codling moth, and from ≈20 to ≈5% for the second generation. Interestingly, addition of l-aspartate also increased the average weight of apples by 11"“27%, as measured at the time of harvest.

Recommended Citation

Pszczolkowski, Maciej A., and John J. Brown. Enhancement of insecticides against codling moth (Lepidoptera: Tortricidae) with L-aspartate in laboratory and field experiments." Journal of economic entomology 107, no. 3 (2014): 1163-1171."

DOI for the article

http://dx.doi.org/10.1603/EC13446

Department

College of Agriculture

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