Anoxia and hypercarbia packaging influence adult emergence and survival of the pretreated eggs of Callosobruchus chinensis (L.) and mung bean quality during storage
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Author list: Pascua G.F.S.; Photchanachai S.; Srilaong V.
Publisher: Elsevier
Publication year: 2024
Volume number: 185
ISSN: 0261-2194
eISSN: 1873-6904
Languages: English-Great Britain (EN-GB)
Abstract
Mung bean (Vigna radiata (L.) R. Wilczek) is attacked by Callosobruchus chinensis (L.) during storage. This study investigated the post-effects of pretreating C. chinensis eggs with modified atmosphere (MA) conditions (100% CO2, 100% N2, and vacuum-packed) on the emergence and survival of eggs to adults and the effects of MA on mung bean seed quality stored at ambient conditions (28 ± 2 °C; 60 ± 5% Relative humidity) for 12 months. The seeds (500 g with 11.83% moisture content (MC); 98% germination; 22 germination index) were packed using a nylon/linear low-density polyethylene (nylon/LLDPE) (12.5 × 30 × 5 cm3; 120-μm-thick) sealed with those MA conditions for 24 h exposure to the insect eggs. In another set, seeds without insect infestation were studied to assess their quality. Seeds packed with normal air served as control. For the insect eggs, exposure to MA conditions significantly reduced adult emergence, decreased longevity, and shortened adult mortality duration. Percentage of adult emergence (%AE) and number of females were reduced in one egg/seed compared to two eggs/seed. In another set with no observed insects in the samples, the seeds’ MC and total oil content were maintained. However, MA conditions exhibited similar effectiveness in delaying free fatty acids (FFA) generation and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity loss as compared to the control. Consequently, germination percentage and germination index were maintained. Therefore, the use of MA conditions with the packaging material as nylon/LLDPE was able to suppress problems like that of C. chinensis and maintain the quality of mung bean seeds for 12 months. © 2024
Keywords
Callosobruchus chinensis
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