Rearing and Field Release Methods for Cotesia Flavipes Cameron (Hymenoptera: Braconidae), a Parasitoid of Tropical Gramineous Stem Borers

Overholt, William A.; Ochieng, J. O.; Lammers, Pete; Ogedah, K.

doi:10.1017/s1742758400017549

Cited by 59 publications

(90 citation statements)

References 12 publications

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“…Cultures of isofemale lines and the mixed colony were maintained under similar conditions in the laboratory. C. flavipes was reared on fourth instar larvae of Chilo partellus using the "hand-stinging" method described in Overholt et al (1994). C. partellus larvae were maintained on artificial diet (Ochieng et al, 1985) at 25Ϯ2°C, 70-80% RH and 12:12 (L:D) h photoperiod.…”

Section: Methodsmentioning

confidence: 99%

Cotesia flavipes Cameron (Hymenoptera: Braconidae) does not exhibit complementary sex determination (ii) Evidence from laboratory experiments

Niyibigira

Overholt

Stouthamer³

2004

Appl. Entomol. Zool.

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Sex determination in the order Hymenoptera is based on haplodiploid arrhenotoky; in which males develop from unfertilized eggs and are haploid, whereas females develop from fertilized eggs and are diploid. However, some hymenopteran species produce diploid males through a mechanism known as single-locus complementary sex determination (sl-CSD). In these species, heterozygous individuals at a single sex locus develop into females, whereas hemizygotes (haploids) and homozygotes (diploids) develop into males. Inbreeding leads to homozygosity and consequent production of diploid males. We investigated the presence of sl-CSD in the braconid Cotesia flavipes using a series of inbreeding crosses among five isofemale lines. Sex ratio (proportion of females) did not differ among the within-line crosses, between-line crosses and crosses carried out between isofemale lines and a mixed (outbred) colony. Brood size of within-line and between-line crosses did not differ. Culturing populations for 25 generations did not result in changes to more male-biased sex ratios. We conclude that CSD does not exist in C. flavipes. The implications of absence of CSD in C. flavipes are discussed in context of mass rearing for classical biological control programmes.

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Section: Methodsmentioning

confidence: 99%

Cotesia flavipes Cameron (Hymenoptera: Braconidae) does not exhibit complementary sex determination (ii) Evidence from laboratory experiments

Niyibigira

Overholt

Stouthamer³

2004

Appl. Entomol. Zool.

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“…However, C. flavipes and C. sesamiae mate with their siblings before dispersal (21,144,157), and thus Allee effects will not influence establishment.…”

Section: Biological Controlmentioning

confidence: 99%

Biology and Management of Economically Important Lepidopteran Cereal Stem Borers in Africa

Kfir

Overholt

Khan

et al. 2002

Annu. Rev. Entomol.

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372

302

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▪ Abstract Cereals (maize, sorghum, millet, rice) are extremely important crops grown in Africa for human consumption. Of the various insect pests attacking cereal crops in Africa, lepidopteran stem borers are by far the most injurious. All 21 economically important stem borers of cultivated grasses in Africa are indigenous except Chilo partellus, which invaded the continent from India, and C. sacchariphagus, which has recently been found in sugarcane in Mozambique. C. partellus is competitively displacing indigenous stem borers in East and southern Africa. A parasitoid, Cotesia flavipes, was introduced from Pakistan for biological control of C. partellus and caused a 32–55% decrease in stem borer densities. This article is an attempt to summarize the status of knowledge about economically important cereal stem borers in Africa with emphasis on their distribution, pest status and yield losses, diapause, natural enemies, cultural control, host plant resistance, and biological control. Special attention is given to Busseola fusca and C. partellus, the most important pests of maize and grain sorghum.

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“…In the present case, molasses grass did not harbor hosts and close-range stimuli must have been unsuitable for further searching by the parasitoids. Cereal stemborers are often found aggregated in single plants in the field (Overholt et al, 1994;Sallam et al, 2001). Searching for infested patches is an energy-consuming venture and it may be more efficient to stay longer in a favorable patch resulting in longer residence time.…”

Section: Discussionmentioning

confidence: 99%

“…• C, 70-80% RH) according to the method described by Overholt et al (1994). Females used in the bioassays were 1-2 days old and naive with regard to host plant and ovipositional experience.…”

Section: Insectsmentioning

confidence: 99%

Close-Range Host Searching Behavior of the Stemborer Parasitoids Cotesia sesamiae and Dentichasmias busseolae: Influence of a Non-Host Plant Melinis minutiflora

2005

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Rearing and Field Release Methods for Cotesia Flavipes Cameron (Hymenoptera: Braconidae), a Parasitoid of Tropical Gramineous Stem Borers

Cited by 59 publications

References 12 publications

Cotesia flavipes Cameron (Hymenoptera: Braconidae) does not exhibit complementary sex determination (ii) Evidence from laboratory experiments

Cotesia flavipes Cameron (Hymenoptera: Braconidae) does not exhibit complementary sex determination (ii) Evidence from laboratory experiments

Biology and Management of Economically Important Lepidopteran Cereal Stem Borers in Africa

Close-Range Host Searching Behavior of the Stemborer Parasitoids Cotesia sesamiae and Dentichasmias busseolae: Influence of a Non-Host Plant Melinis minutiflora

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