LABORATORY EVALUATION OF CONTACT SEX PHEROMONE AND BISAZIR FOR AUTOSTERILIZATION OF <i>GLOSSINA MORSITANS</i>

Coates, T. W.; Langley, P. A.

doi:10.1111/j.1570-7458.1982.tb03145.x

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…The effect that bisazir, at sterilizing doses in the vapour phase, has on tsetse behaviour, both the readiness to enter the sterilizing chamber and the speed of passage through it once inside is unknown. High doses of bisazir in the laboratory and in the field are irritating and even repellent to male G.m.morsitans when presented on pheromone-baited decoys (Coates & Langley, 1982).…”

Section: Discussionmentioning

confidence: 99%

Development of a system for sterilizing tsetse flies, Glossina spp., in the Held

Hall

Langley

1987

Medical Vet Entomology

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Various autosterilizing systems were evaluated on natural populations of Glossina pallidipes Austen and G.morsitans morsitans Westwood in Zimbabwe. These involved a clear plastic tower of two or three chambers mounted at the cage position on a trap. Inside one chamber flies could be exposed to the vapour phase of the chemosterilant bisazir, P,P-bis (1-aziridinyl)-N-methylphosphinothioic amide. The system was designed to encourage flies to enter the sterilizing chamber, delaying their exit for sufficient time to expose them to a sterilizing dose. This was accomplished in the most effective system by restriction of the exit to one small hole (6 mm diameter) at the roof-side junction. The number of flies remaining in the chamber declined exponentially. The rate of exit was directly proportional to the density of flies in the sterilizing chamber and to the number of exit holes. The probability of a fly being in this chamber for at least 1 or 7 min (the times taken for female and male G.m.morsitans respectively to receive an ED50) was 0.84 and 0.67 respectively with one fly present. With sixteen flies, these probabilities were 0.76 and 0.18 respectively. Results suggest that it may be possible to develop a cheap, safe and efficient autosterilizer for use on tsetse traps.

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Section: Discussionmentioning

confidence: 99%

Development of a system for sterilizing tsetse flies, Glossina spp., in the Held

Hall

Langley

1987

Medical Vet Entomology

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“…Decoys were 9 x 3-mm black-coloured, brushed nylon rectangles (Coates & Langley, 1982a), cleaned before use in ten changes of boiling chloroform. They were attached by their brushed sides with Velcro to a black cotton cloth screen of ca.…”

Section: General Field Conditionsmentioning

confidence: 99%

“…Initial field trials showed that males of G. m. morsitans responded to pheromone-baited decoys by alighting on them and attempting to mate (Langley et al, 1981), but the responses were short compared to those in the laboratory and occurred only with decoys attached to a moving screen. Coates & Langley (1982a) demonstrated that a combination of the sex pheromone and a chemosterilant, bisazir (P,P-bis(l-aziridinyl)-Ar-methylphosphinothioic amide), on a decoy could induce sterility in G. m. morsitans males. However, when such decoys were tested in the field with a view to developing an autosterilizing technique, most durations of contact between male and decoy were too short to be effective (Langley et al, 1982).…”

Section: Introductionmentioning

confidence: 99%

The orientation of males of Glossina morsitans morsitans Westwood (Diptera: Glossinidae) to pheromone-baited decoy ‘females’ in the field

Hall

1987

Bull. Entomol. Res.

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Field studies in Zimbabwe of the orientation of males of Glossina morsitans morsitans Westwood to decoy ‘females’ (9 × 3-mm rectangles of 2-mm thick brushed nylon, baited with sex pheromone, 15,19,23-trimethyl-heptatriacontane, and placed on a vertical, 1-m2 black cloth screen) demonstrated that (1) no olfactory response to air-borne pheromone was involved in the orientation of males to decoys, (2) the presence of decoys on a stationary screen did not increase the numbers of males landing on the screen, but they directed landings onto the decoys or the adjacent screen surface, (3) males did not differentiate between black or brown decoys, (4) males were more attracted to vertically oriented decoys on the screen surface than to decoys held away from the surface, and (5) males were more attracted to decoys at the centre of the screen than to decoys near the top or bottom edges. Points 1, 2 and 4 also applied in the case of G. pallidipes Austen using decoys dosed with its pheromone (13,23-dimethylpentatriacontane), but this species preferred black to brown decoys and showed less overt sexual activity than G. m. morsitans. Males of G. m. morsitans each removed 1–2μg of pheromone by contact with a decoy, leading to a gradual loss of the decoy's stimulatory power.

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Copulatory Dialogues Between Male and Female Tsetse Flies (Diptera: Muscidae: Glossina pallidipes)

Briceño¹,

Eberhard

2017

J Insect Behav

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LABORATORY EVALUATION OF CONTACT SEX PHEROMONE AND BISAZIR FOR AUTOSTERILIZATION OF GLOSSINA MORSITANS

Cited by 8 publications

References 23 publications

Development of a system for sterilizing tsetse flies, Glossina spp., in the Held

Development of a system for sterilizing tsetse flies, Glossina spp., in the Held

The orientation of males of Glossina morsitans morsitans Westwood (Diptera: Glossinidae) to pheromone-baited decoy ‘females’ in the field

Copulatory Dialogues Between Male and Female Tsetse Flies (Diptera: Muscidae: Glossina pallidipes)

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