Abstract
The potential abilities of 3-methylbenzaldehyde derived from Myosotis arvensis oil and its structural analogues to act as new acaricide and mite kit (mite color deformation) against Tyrophagus putrescentiae (Schrank) were evaluated in the present study. Based on the LD50 values, 2,4,5-trimethylbenzaldehyde (0.78 μg/cm3) had highest vapor action against T. putrescentiae, followed by 2,4-methylbenzaldehyde (1.14 μg/cm3), 2,5-dimethylbenzaldehyde (1.29 μg/cm3), 2-methylbenzaldehyde (1.32 μg/cm3), 2,3-dimethylbenzaldehyde (1.55 μg/cm3), 3-methylbenzaldehyde (1.97 μg/cm3), and 4-methylbenzaldehyde (2.34 μg/cm3). The color deformation of seven methylbenzaldehyde analogues mixed with 2,3-dihydroxybenzaldehyde against T. putrescentiae showed mite color deformation, from coloress to reddish brown, and valuable to distinguish with the naked eye. In addition, there was no antagonistic interactions between 2,3-dihydroxybenzaldehyde and the methylbenzaldehyde analogues. These finding suggests that the methylbenzaldehyde analogues could be developed as dual functional agent to protect from fall in the commercial value of stored food products.
Highlights
Tyrophagus putrescentiae (Schrank), commonly known as a cosmopolitan species of stored food mites, is found infesting a wide range of foods containing a high amount of protein and fat, such as cheese, cured ham, dried eggs, and nuts[1]
Plants and their related constituents have been studied as an alternative to synthetic acaricides, antimicrobials and insecticides because of the abundant materials used as herbal medicines[20,21,22,23]
The essential oils of M. arvensis aerial parts and seeds were extracted with a yield of 0.081 and 0.046%, respectively
Summary
The potential abilities of 3-methylbenzaldehyde derived from Myosotis arvensis oil and its structural analogues to act as new acaricide and mite kit (mite color deformation) against. These finding suggests that the methylbenzaldehyde analogues could be developed as dual functional agent to protect from fall in the commercial value of stored food products. Stored food mites have been reported to be significantly tolerant to pyrethroids[11, 17, 18] In this regard, developing new agents for controlling stored food mites to prevent the degradation of valuable foods/grains is significantly challenging. Plants and their related constituents have been studied as an alternative to synthetic acaricides, antimicrobials and insecticides because of the abundant materials used as herbal medicines[20,21,22,23].
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