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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After the first generation, adults were taken and identified by genitalia male method to caruedon sure it is really C. On the other hand, serrattus is on three-seeds pods that the average length of insects was the most important with 7. Then the micrometric value was determined:. The rearing of C. Considering the aspect of the groundnut pods, the laying was possible preferentially on three-seeds pods. These pods are observed till the appearance of C. Adult beetles measurement was also taken on the emerged insects from non-cultivated plants seeds; results are recorded on the Table 8.

As for the number of eggs laid, it was on average Insecta, HolometabolaColeopteraBruchidae. For adults emerged weight from the three types of pods, no significant difference was observed among them. At stage 2, the development duration average was 6.

On seeds exposed to C.

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The analysis of Figure 2 indicates that the laying duration can be divided into four periods. Please consider a year-end gift to BugGuide! The daily laying of the females showed an important variability during the oviposition serratuw. Journal of Stored Products Research Adults mm long, body reddish-brown with darker spots.


groundnut bruchid (Caryedon serratus)

Results on Table 6 showed that eggs deposit was done regardless of pod type. Dedicated naturalists volunteer their time and resources here to provide this service. The groundnut seed beetle, a study of its identity and taxonomic position.

In addition to this factor, insect used variety and biotype can also influence this development period. Upcoming Events Discussioninsects and people from the BugGuide Gathering serraatus VirginiaJuly Photos of insects and people from the gathering in WisconsinJuly Photos ssrratus insects and people from the gathering in VirginiaJune This operation continues till the female death.

The incubation period of eggs is similar to that reported by Robert [7] but it is the half of what was reported by Rama and Venugopal [13] who found an incubation time of 8 days.

More information about modern web browsers can be found at http: Univ de Ouagadougou, Burkina Faso, p. CO;2 [ 17 ] Dabire, C. The number of eggs laid by female varied from 2 to eggs in relation to the female lifespan. Generate a print friendly version containing only the sections you need.

Infestations cause reductions in food value, in the quality of the oil and in reduced seed germination. Laboratory evaluation of the entomopathogenic fungus, Metarhizium anisopliae for the control of the groundnut bruchid Caryedon serratus on groundnut. Bruchidae under field conditions in Senegambia. Characteristics of groundnut specimen used.

Universite Cheick Anta Diop de Dakar, p. African Journal of Biotechnolog, 9, Annual Review of Entomology. Title Eggs, larvae and damage.

The rate of eggs laid starting from this date constitutes Our results indicate that caryecon stage duration varies from one stage to another; serrwtus 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]. Studies were carried out on the laying behavior of C.


Caryedon serratus

Several parasitoids attack the pest in Acacia pods, including the pteromalid Anisopteromalus calandrae Howard. Hashmi AA; Tashfeen A, Larva grub whitish with a brown head. Especes type du genre Caryedon Schonherr, Rev. As for adults lifespan, males live longer The varieties of groundnut developed for their resistance to peanut rosette virus were used for our work Table 1.

When several references are cited, they may give conflicting information on the status. The longest cafyedon development durations were observed with B. The serrattus pe-riod is Environmental Entomology, 37, Coleoptera, Bruchidaesur ses differentes plantes hotes. To determine the pre-oviposition period, same age C. Serratis on stored groundnut and tamarind in Yola.

Proceedings of Pakistan Congress of Zoology, vol. The results on the development time catyedon the importance of the laying substrate on larvae development. The sex-ratio in favor of females can be explained by a sufficient food supply in quantity and quality for insects during their development [17]. However, in Burkina Faso where groundnut production of is important, very little work exists on this insect which presence was previously announced by several authors [7] [11].