Post-harvest disinfestation of lightbrown apple moth,<i>Epiphyas postvittana</i>Walker (Lepidoptera: Tortricidae), with an alkane

Taverner, Peter; Bailey, Peter; Hodgkinson, M. C.; Beattie, G. A. C.

doi:10.1002/(sici)1096-9063(199912)55:12<1159::aid-ps74>3.0.co;2-l

Cited by 14 publications

(1 citation statement)

References 18 publications

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“…The results of the present investigation agreed with these findings. Oils have a preference for the surface of the insect or mite's body and penetrate its cuticle ( (Taverner et al, 1999). The biological efficiency of solar emulsifiable concentrate was tested on T. urticae immature, males, females and egg hatching under greenhouse conditions.…”

Section: Biological Activitymentioning

confidence: 99%

Acaricidal efficiency of solar 50 % new emulsifiable concentrate formulation against the two-spotted spider mite (TSSM) Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory and greenhouse conditions

Safar

Mai²,

M³

2022

JANS

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Oils are some of the most efficient and secure alternatives to synthetic fungicides, acaricides and insecticides used as pesticides for decades. Around the world, mineral oils are a potential pesticide against many pests. To provide novel active ingredients and new pesticide formulations to the pesticide industry, the major goal of this research was to formulate one of the petroleum fractions and test its acaricidal efficiency against two-spotted spider mite (TSSM), Tetranychus urticae Koch (Acari: Tetranychidae). Solar's physical features were put to the test. Then, it was prepared as an emulsifiable concentrate following the guidelines provided by specialized pesticide organizations for this kind of formulation. The novel formulation was subsequently biologically tested against T. urticae adults in the lab, and it demonstrated good acaricidal activity with an LC50 of 4548 ppm. Under greenhouse conditions, it was also tested against T. urticae immature, adults (males and females) and number of deposited eggs. There was a direct correlation for all stages between concentration, the percentage of immature and adult mortality, and the percentage of egg-hatching inhibition. In the case of the immature, 100% mortality was shown after 7 days of treatment. However, in the case of adult males and females, 100% mortality was shown after 3 days of treatment. Additionally, after 14 days from treatment, it entirely stopped egg depositing. The new formulation might be applied to manage the TSSM.

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Section: Biological Activitymentioning

confidence: 99%

Acaricidal efficiency of solar 50 % new emulsifiable concentrate formulation against the two-spotted spider mite (TSSM) Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory and greenhouse conditions

Safar

Mai²,

M³

2022

JANS

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The efficacy of a petroleum spray oil against Aphis gossypii Glover on cotton. Part 1: Mortality rates and sources of variation

Najar-Rodríguez

Walter

Mensah

2007

Pest Management Science

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Petroleum spray oils (PSOs) kill insect pests on contact, and the composition of modern PSOs is substantially different from the ones introduced earlier. The effects of direct application of a new nC24 PSO on the cotton aphid, Aphis gossypii Glover, were therefore determined. This covered not only aphid mortality rates but also the way in which the oils affected aphid behaviour at the time of contact with the oil. Direct application of the nC24 oil proved to be highly effective in controlling A. gossypii at a range of concentrations between 1 and 10% v/v. The oil killed cotton aphids quickly, with most of the mortality occurring within the first 10 min of spraying. The fast killing action of the oils prevented any behavioural responses by the aphids. Aphids killed by the oils became flaccid and their legs and antennae extended horizontally relative to the body axis. With time, their cuticle became very shiny and began to darken. The quick death of the aphids suggested a contact mode of action of the oils, an interpretation supported by the lack of any negative effect on aphids not initially reached by the oils. However, those aphids not hit by the oils, but that subsequently encountered oil-treated areas when they moved elsewhere, also died, indicating that the oil deposits are also toxic to the aphids. The mode of action of the oil thus seems to be versatile, and the means by which it kills the aphids may be more complex than anoxia, which is the widely claimed mechanism attributed to PSOs. This oil now needs to be tested for any possible indirect effects on the cotton aphid (e.g. through its host-plant acceptance behaviour). The implications of the present findings for cotton aphid control and assessment of PSO efficacy in the field are discussed.

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Evidence for oil‐induced oxidative stress to larvae of the lightbrown apple moth, Epiphyas postvittana Walker (Lepidoptera: Tortricidae)

Taverner

Bailey

Roush³

2002

Pest Management Science

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For the purpose of understanding better the mode of action of alkanes on insects, the relationship between mortality, weight loss in oxygen enriched atmospheres and dietary antioxidants was examined using an alkane, C15 Ampol CPD and a spray oil, C23 DC-Tron NR, on lightbrown apple moth, Epiphyas postvittana Walker, (LBAM). The results showed that the surfactant blend used in CPD was an insignificant contributor to the overall toxicity of dilute oil/water emulsions. Higher weight loss occurred in CPD-dipped larvae than C23 DC-Tron NR-dipped larvae, which suggests that alkanes disrupt tracheal waxes and render insects more prone to desiccation. High levels of oxygen increased the toxicity of CPD to LBAM larvae. In addition, dietary supplements of anti-oxidant, alpha-tocopherol, fed to LBAM larvae were successful in reducing the toxicity of CPD. These results suggest that the alkane may contribute to oxidative injury. The potential role of oil-induced oxidative stress in acute and chronic toxicity in insects is discussed.

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Post-harvest disinfestation of lightbrown apple moth,Epiphyas postvittanaWalker (Lepidoptera: Tortricidae), with an alkane

Cited by 14 publications

References 18 publications

Acaricidal efficiency of solar 50 % new emulsifiable concentrate formulation against the two-spotted spider mite (TSSM) Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory and greenhouse conditions

Acaricidal efficiency of solar 50 % new emulsifiable concentrate formulation against the two-spotted spider mite (TSSM) Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory and greenhouse conditions

The efficacy of a petroleum spray oil against Aphis gossypii Glover on cotton. Part 1: Mortality rates and sources of variation

Evidence for oil‐induced oxidative stress to larvae of the lightbrown apple moth, Epiphyas postvittana Walker (Lepidoptera: Tortricidae)

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