The effects of corpora cardiaca on tethered flight in the Locust

Goldsworthy, G.J.; Coupland, Alex; Mordue, W.

doi:10.1007/bf00696803

Cited by 37 publications

(11 citation statements)

References 6 publications

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“…However, neither of these explanations appears to be correct since injection of an extract of the corpora cardiaca containing the adipokinetic hormone caused a large significant increase in plasma lipid in both control and mycosed insects. The extent of the hyperlipaemia was similar to that recorded by G OLDSWORTHY and M ORDUE (1973) when they injected an extract equivalent to 0.05 of a gland pair into a desert locust.…”

Section: Discussionsupporting

confidence: 81%

“…Subsequently they make use of their more substantial stores of lipid (G OLDSWORTHY et al., 1972a). Although during early flight carbohydrate, in the form of trehalose, is mobilized from the fat body the haemolymph carbohydrate concentration declines over approximately the first 30 min (G OLDSWORTHY and M ORDUE , 1973). A decline in plasma carbohydrate was seen here with both control and fungus‐infected locusts, although only with control locusts was the change significant after 10 min.…”

Section: Discussionmentioning

confidence: 99%

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The effect of Metarhizium anisopliae var acridum on haemolymph energy reserves and flight capability in the desert locust, Schistocerca gregaria

Seyoum

Bateman

Charnley

2002

J Applied Entomology

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Adult desert locusts, Schistocerca gregaria, 3 days after inoculation with the entomopathogenic fungus Metarhizium anisopliae var acridum, had significantly less carbohydrate and lipid in the haemolymph than controls. This was not due to reduced food intake as 3 days of complete starvation had no effect on haemolymph titres of energy reserves in controls. Furthermore injection of an extract of the corpora cardiaca (the source of adipokinetic hormone, AKH) caused a large significant increase in haemolymph lipid in mycosed locusts, indicating the availability of significant quantities of lipid in the fat body, the target for AKH. Haemolymph carbohydrate declined significantly during tethered flight of control locusts but not in mycosed individuals. An injected supplement of trehalose significantly boosted flight performance of mycosed insects but not controls. The results are discussed in the light of the hypothesis that the poor flight capability of mycosed locusts is due in part to a fungus‐induced reduction in mobile energy reserves.

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

The effect of Metarhizium anisopliae var acridum on haemolymph energy reserves and flight capability in the desert locust, Schistocerca gregaria

Seyoum

Bateman

Charnley

2002

J Applied Entomology

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“…A similar reduction in feeding has been recorded in other insects infected with entomopathogenic fungi e.g. Beauveria bassiana with Heliothis zea (CHEUNG and GRULA 1982) and M. flavoviride with Locusta migratoria (SANYANG 1992) Short and long-term flight patterns in locusts were studied by GOLDSWORTHY et al (1973GOLDSWORTHY et al ( , 1979. hormone is released, stimulating the mobilization and utilization of lipids (GOLDSWORTHY et al 1972;CHEESEMAN et al 1976).…”

Section: Feeding Experimentssupporting

confidence: 60%

Reduction in flight activity and food consumption by the desert locust, Schistocerca gregaria Forskål (Orth., Cyrtacanthacrinae), after infection with Metarhizium flavoviride

Seyoum

Moore

Charnley

1994

J Applied Entomology

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Adult Schistocerca gregaria were infected with the entomopathogenic fungus Metarhizium flavoviride and their flying ability and rates of food consumption recorded over the subsequent days to death, which usually took about 6 days. Significant reductions in both flight and feeding occurred, usually by the 3rd day after application of the fungus. The diminished levels of pest activities before death reduces the perceived disadvantage of a relatively slow time to kill of the mycoinsecticide.

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“…We have not, however, eliminated the possibility of neuroendocrine involvement in flight and/or reproduction in Hippodamia. Indeed, migratory flight in orthopterans (Mayer & Candy, 1969;Goldsworthy et al, 1972Goldsworthy et al, , 1973 and possibly in Danaus plexippus (Dahlmann & Herman, 1978) requires an adipokinetic hormone from the CC, while oogenesis control in many insects has been shown to involve brain or corpora cardiaca (Engelmann, 1968).…”

Section: Discussionmentioning

confidence: 99%

The hormonal control of migratory flight behaviour in the convergent ladybird beetle, Hippodamia convergens

Rankin¹,

Rankin²

1980

Physiological Entomology

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Topical application of the juvenile hormone mimic, Altosid, t o Hippodamia convergens (GuBrin-MBneville) (Coccinellidae) stimulated a significant increase in long-term flight behaviour in both males and females. Altosid treatment also stimulated ovarian development in females. Topical application of precocene I1 to Hxonvergens inhibited flight activity in treated animals of both sexes for about 10 days. Altosid treatment to precocene-treated beetles significantly increased their migratory behaviour over that of precocene-treated or acetone-treated controls. These results indicate that juvenile hormone stimulates migratory flight behaviour in this species along with reproductive development. It is likely that the hormone serves to coordinate migration with reproduction in the young adult.

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The effects of corpora cardiaca on tethered flight in the Locust

Cited by 37 publications

References 6 publications

The effect of Metarhizium anisopliae var acridum on haemolymph energy reserves and flight capability in the desert locust, Schistocerca gregaria

The effect of Metarhizium anisopliae var acridum on haemolymph energy reserves and flight capability in the desert locust, Schistocerca gregaria

Reduction in flight activity and food consumption by the desert locust, Schistocerca gregaria Forskål (Orth., Cyrtacanthacrinae), after infection with Metarhizium flavoviride

The hormonal control of migratory flight behaviour in the convergent ladybird beetle, Hippodamia convergens

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