Abstract. The present research was aimed to study the biology of Caryedon serratus (Olivier) on groundnut,. Arachis hypogaea (L.) under. C. serratus infestation of groundnuts is revealed by larval emergence holes and the presence of cocoons outside the pods. Feeding damage to the seeds can be . Higher rates of infestation by the larvae of the seed weevil Caryedon serratus Olivier (Col., Bruchidae) were recorded. The larvae of C. serratus bore into the.

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The development duration is faster on F.

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Average measurement of lately emerged adult from groundnut pods with one seed, two seeds and three seeds. Journal of African Zoology, Please consider a year-end gift to BugGuide! The results Table 2 indicate that eggs incubation period is 4. As for adults lifespan, males live longer Our results indicate that larval stage duration varies from one stage to another; which was not the case with the results reported by some authors who found a 4 days average duration for the first three larval stages [13].

Collection Techniques Rurales en Afrique, Bulletin of Entomological Research, 49 2: The objective is not only to determine the influence of these laying substrates on the development of the groundnut beetle, but also to study the impact of these feeding caryefon available to the larvae on the development and the morphology of the adults. The number of eggs laid by each female is counted serrratus the end of three weeks.

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Advances in Entomology4 Thereafter, a decrease of laying is observed during the setratus following days where the egg rate decreases to eggs In spite of a growing production, groundnut remains out of the reach of consumers at some periods of the year. Table 7 shows results on C. The beetles are kept for one week in the cages and exposed to the groundnut pods.

Caryedon serratus

Conflicts of Interest The authors declare no conflicts of interest. Journal of Stored Products Research, 22, The females lay several hundred eggs, more in shelled groundnut than in tamarind and unshelled groundnuts, gluing them to the surface of the shells or kernels.

Dedicated naturalists volunteer their time and resources here to provide this service. The daily laying of the females showed an important variability during the oviposition period. Four repetitions were followed with the seeds of each plant used. Entomologia Experimentalis et Serfatus, 42, Coleoptera, Bruchidaesur ses differentes plantes hotes.

Several parasitoids attack the pest in Acacia pods, including the pteromalid Anisopteromalus calandrae Howard. At the emergence, species identification was done [12]. From the 18 th day after the laying beginning, the number of eggs accounts for only 2.


Females showed a period of relatively short pre oviposition, and 24 hours after their emergence spawning activity begins. Cunningham and Walsh, Quality status of groundnut seed at farmers level in Gujarat.

Tropical Agriculture, 40 3: However, in Burkina Faso where groundnut production of is important, very little work exists on caeyedon insect which presence was previously announced by several authors [7] [11].

African Journal of Biotechnolog, 9, The analysis of Figure 2 indicates that the laying duration can be divided into four periods. Laying comparison according to the botanical family indicates that C.

Caryedon serratus (Olivier) – Caryedon serratus –

All the experiments were carried out with seeds belonging to various leguminous plants. Characteristics of groundnut specimen used. The newly hatched larva burrows straight through the eggshell and pod wall, and eats the kernel, feeding only within a single seed.