Oviposition preference and life‐history parameters of Callosobruchus maculatus (Coleoptera: Chrysomelidae) on different soybean (Glycine max) cultivars

Abstract

BACKGROUND Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae) is one of the most destructive pests of stored legume seeds in many regions of the world. Evaluation of varietal resistance of host seeds to C. maculatus infestation can be useful in preventing severe damage. We studied the susceptibility and resistance of eight conventional soybean cultivars (Caspian, Kosar, L17, Nekador, Sari, Tapour, Williams and Zane) based on the oviposition preference (choice and no‐choice tests) and population growth parameters of the pest. RESULTS Compared with other cultivars tested, oviposition preference of C. maculatus was the lowest on Nekador. The developmental time of C. maculatus differed from 40.34 days on Nekador to 48.35 days on L17, and was negatively correlated with the seed protein content. Other performance measures of C. maculatus did not match the oviposition preference. Immature survival and female longevity were highest on Caspian. The intrinsic rate of increase (rm) was higher on Tapour, Nekador and Caspian than on Zane, Williams, and Kosar. A positive correlation was observed between the rm value of the pest and moisture content of the cultivars. Cluster analysis showed that cvs Nekador, Sari, Tapour, and Caspian were relatively susceptible, and cvs Kosar, Zane, Williams and L17 were partially resistant to this pest. CONCLUSION Protein and moisture contents of soybean cultivars play an important role in the development and population growth of C. maculatus, and these traits could be used to develop safe and effective management strategies for this pest on stored soybean seeds. © 2022 Society of Chemical Industry.

Resistance of some Soybean Genotypes to Bruchids: Callosobruchus chinensis L. as Influenced by Different Biochemical and Seed Quality Traits

“…When compared the infected seeds of the two genotypes Misr 6 and PI 416937, their MC % showed no significant difference between them 14.8 % and 15 %, respectively, however the infested seeds of H6 L58 recorded the lowest MC% (14.15 %), with no discernible change from its uninfected seeds (13.75 %) at P < 0.05, as shown in Figure 1. The seed coat thickness of the host seed is one of the physical characteristics that can affect bruchids like C. chinensis oviposition behavior (Naseri et al ., 2022). The genotype Giza 22 retained the thickest coat (8.25 µm) for the infested seeds during the storage period, while the genotype Misr 6 demonstrated a significant decrease in its coat thickness, measuring half of what it had before insect infestation (Figure 2), that reflected on the laid eggs on their seeds since the genotypes H6 L158 and Misr 6 had the highest number of laid eggs 95.50 ± 1.04 and 89.00 ± 5.08 due to their thin and weak seed coat which ease the seed penetration by the insects to lay its eggs inside the grain of soybean , while Giza 22 and PI 416937 had the lowest number of deposited eggs with 42.00 ± 1.77 and 47.25 ± 4.53, respectively.…”

Biología de Callosobruchus maculatus (Fab. 1775) (Coleoptera: Bruchinae) “gorgojo del caupí”, en semillas de Vigna unguiculata (L.)

“…Uno de los problemas esenciales que se presentan en los granos almacenados de esta leguminosa y otras, son los bruquídos, a nivel mundial constituyen un serio problema para los granos de diversas especies vegetales que son fuente nutricional de muchas personas en todo el mundo o cuando éstos son almacenados como semillas, al ver afectado seriamente su poder germinativo, cantidad y calidad (Segers et al, 2023, Elhefny et al, 2022. Callosobruchus maculatus (Fab.1775)(Coleoptera: Chrysomelidae), comúnmente conocido como "escarabajo de la semilla de caupí" es una grave plaga cosmopolita de varias leguminosas almacenadas (Segers et al, 2023;Mansouri et al, 2022;Naseri et al, 2022;Amiri & Bandani, 2021;Sindhura et al, 2020), como el caupí (V. unguiculata L.), la soja (Glycine max L.), el guisante común (Pisum sativum L.) (Adebayo & Oke 2017); aunque tiene preferencia especial por los granos de frijol caupí, su huésped ancestral, donde por el grado de infestación que se puede observar en los centros de abastecimiento de este producto puede considerársele como una plaga clave de éstos llegando a ocasionar pérdidas de hasta el 100% de los granos almacenados (Tengey et al, 2023). Haouel-Hamdi et al, (2018) reportan haber criado una colonia de laboratorio de C. maculatus en garbanzo (Cicer arietinum) durante 45 generaciones y consideran que el garbanzo puede ser también un huésped "habitual" de estos gorgojos.…”