Effects of vegetation and weather on trap catches of Glossina fuscipes fuscipes near Lake Victoria, Kenya

Abstract

Glossina fuscipes fuscipes Newstead was sampled in isolated thickets and forest patches near Lake Victoria, Kenya using unbaited biconical traps, between March 1992 and June 1993. Traps set at 1 m from the forest edge caught 3.3 times as many males and 5 times as many females as those set inside or 10 m away. The corresponding figures at 1 m from the edge of thicket were about 1.43 and 1.64 times, respectively. Hourly catches of males and females were positively correlated with temperature, light intensity and host (monitor lizard) prevalence, and negatively correlated with relative humidity. Light intensity and temperature were the most important variables affecting the catches of each sex. The results are discussed in relation to control and monitoring of G. f. fuscipes using traps.

The diurnal activity, movement and trypanosome infection rates of Glossina fuscipes fuscipes (Diptera: Glossinidae) in Buvuma Island, Lake Victoria, Uganda

“…Carpenter (1913) on Bugalla Island, found the number of flies to coincide with temperature. Our results are also consistent with the works of Mohamed-Ahmed and Wynholds (1997) at the mainland of Mbita, near Lake Victoria, Kenya, also for this species. The greater positive correlation between activity of female flies and temperature may possibly indicate that female flies are more responsive to tempera- ture changes than males.…”

“…There was a bimodal diurnal activity pattern for G. f. fuscipes in Buvuma Island which was similar in both lakeshore and hinterland locations. Such a pattern of activity is consistent with previous findings for this species (Harley, 1965;Mohamed-Ahmed & Wynholds, 1997) The positive correlation between temperature and wind speed and number of flies reflects the marked effect of temperature and wind speed on the activity of the flies. That is, flies are sluggish on cold cloudy days and few may be caught, although in reality, many are present.…”

Impact of Trap Design, Windbreaks, and Weather on Captures of European Corn Borer (Lepidoptera: Crambidae) in Pheromone-Baited Traps

“…Butler et al (1999) collected the most Lepidoptera in blacklight traps on warm nights compared with cool nights and noted that there was a negative relationship between precipitation and moth captures in blacklight traps. Mohamed-Ahmed and Wynholds (1997) found that the temperature was the most important weather variable that inßuenced (positively) tsetse ßy, Glossina fuscipes fuscipes Newstead (Diptera: Glossinidae), captures in traps. Vogt (1986) noted that temperature was the most inßuential, and positive, factor in captures of the ßy Musca vetustissima Walker (Diptera: Muscidae) in traps.…”

“…The location or surroundings of insect traps inßu-ences their efÞciency (Wellington and Trimble 1984, Lee 1988, Mason et al 1997, Sappington and Spurgeon 2000, Kavallieratos et al 2005, and insect responsiveness to traps is often a function of weather (Davidson and Andrewartha 1948, Vogt 1986, Gregg et al 1994, Mohamed-Ahmed and Wynholds 1997, Butler et al 1999. Windbreaks such as tree lines modulate air movement, airborne chemicals, and airborne insects (Lewis and Dibley 1970), and an insectÕs ability to control ßight is a function of wind speed.…”

Ecological studies of the European corn borer (Lepidoptera: Crambidae): nosema dose-response, pheromone trapping, and adult dispersal

“…The location or surroundings of insect traps influences their efficiency (Wellington and Trimble 1984, Lee 1988, Mason et al 1997, Sappington and Spurgeon 2000, Kavallieratos et al 2005, and insect responsiveness to traps is often a function of weather (Davidson and Andrewartha 1948, Vogt 1986, Gregg et al 1994, Mohamed-Ahmed and Wynholds 1997, Butler et al 1999. Windbreaks such as tree lines modulate air movement, airborne chemicals, and airborne insects (Lewis and Dibley 1970), and an insect's ability to control flight is a function of wind speed.…”