Distinguishing injury from damage and post-storage damage projection.

Stejskal, V.; Lukas, Jonathan; Credland, P. F.; Armitage, D. M.; Bell, C. H.; Cogan, P. M.; Highley, E.

doi:10.1079/9780851996912.0095

Cited by 2 publications

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“…Volatile compounds emitted by these mites are responsible for the unpleasant odors in mite-infested storage products, and causing a negative impact on the animal feed industry. 6,7 The population growth dynamics of storage mites exhibit a rapid, typically exponential increase, culminating in a peak within approximately 1 month. Following this outbreak, there is a precipitous decline in the mite population.…”

Section: Introductionmentioning

confidence: 99%

Quantitative identification and sensor sensitivity analysis in detection of odor volatile compounds emitted by scaly grain mites, Suidasia pontifica Oudemans

Ta‐Phaisach,

Konvipasruang,

Attasopa

et al. 2024

Pest Management Science

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BACKGROUNDIn Thailand, the scaly grain mite, Suidasia pontifica Oudemans, impacts the feed industry by emitting a lemongrass‐like odor in contaminated feed, reducing its palatability. This study focused on identifying volatile organic compounds (VOCs) associated with this odor in contaminated chicken feeds and ground maize, as well as individual mites using gas chromatography–mass spectrometry (GC–MS). We explored the relationship between VOC concentration and mite population size in chicken feed cultures, aiming to detect minimal mite presence through regression models. Additionally, we tested the sensitivity of nine electronic odor sensors in detecting these VOCs.RESULTSOur results showed Z‐citral and E‐citral present in mite‐contaminated ground maize, chicken feeds, but absent in uncontaminated samples. Mite populations in chicken feed followed a normal distribution, increasing rapidly, peaking, and then declining, a pattern mirrored in the concentrations of Z‐citral and E‐citral. Simple linear regression models confirmed a positive correlation between mite density and citral concentrations. Polynomial regression models indicated Z‐citral is detectable at mite densities over 67 individuals per gram and E‐citral over 3.89 individuals per gram. Odor sensors showed varying readings across different citral concentrations, uncontaminated, and mite‐infested chicken feeds.CONCLUSIONSOur study confirms that S. pontifica are responsible for the lemongrass‐like odor in infested samples, due to Z‐citral and E‐citral. The citral concentrations increase with mite population growth and are detectable at low mite densities, suggesting their effectiveness as biomarkers for early mite infestation detection. Additionally, MQ series odor sensors detected these VOCs, indicating their potential for monitoring mite infestations in storage environments.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Quantitative identification and sensor sensitivity analysis in detection of odor volatile compounds emitted by scaly grain mites, Suidasia pontifica Oudemans

Ta‐Phaisach,

Konvipasruang,

Attasopa

et al. 2024

Pest Management Science

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“…The 'risk' (probability) of the damage-event occurring should also be taken into account. I think that the establishment of exact EILs (EDLs) of 'preventively controlled' pest organisms may help to re-evaluate their pest status (Mumford, 1982) and has potential to decrease the use of some preventive pesticide measures (Stejskal and Lukas, 2002).…”

Section: Introductionmentioning

confidence: 99%

‘Economic Injury Level’ and preventive pest control

Stejskal

2003

AFS

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Although the 'Economic Injury Level' (EIL) concept belongs to the keystones of IPM theory, its applicability to all pest problems is believed not to be universal. Current IPM theory claims that the EIL concept is of limited use (i) in situations where an injury-damage function cannot be established, (ii) if pest monitoring is impossible or EIL is very low, and (iii) with preventive measures of pests and pathogens. In this work, I argue that the two latter points may not be true. First, within IPM all types of chemical treatment, including preventive ones, should be economically justified via calculation of EIL, based on the comparison of the cost of preventive and responsive control measures and the cost of the forecasted/expected damage. The 'expected' damage should be based on long-term (historical) damage records, manipulative experiments, risk assessment and biomathematical modelling of the evaluated pathosystem. Second, the absence of EIL in 'preventively controlled pests' hampers completion of the consistent Stern-Pedigo's classification of pest organisms according to mutual position of EIL and General Equilibrium Position (GEP) or Stationary Distribution of Population Densities (SDPD).

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Distinguishing injury from damage and post-storage damage projection.

Cited by 2 publications

References 0 publications

Quantitative identification and sensor sensitivity analysis in detection of odor volatile compounds emitted by scaly grain mites, Suidasia pontifica Oudemans

Quantitative identification and sensor sensitivity analysis in detection of odor volatile compounds emitted by scaly grain mites, Suidasia pontifica Oudemans

‘Economic Injury Level’ and preventive pest control

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