PubMed · 5915042
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Insect control and insecticides.. https://pubmed.ncbi.nlm.nih.gov/5915042/
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A new type of portable aspirator is described. The aspirator uses as a suction device a fan that normally cools computers, in conjunction with other structural elements especially designed to cope with the greater suction power available. The device proved to be efficient, strong, light, easy to use, and silent.
The Lambwe Valley is shared between wild animals in a national park and adjacent human settlements with domestic livestock. Thicket and woodland in the valley are heavily infested with Glossina pallidipes. Rhodesian sleeping sickness continues to be a major human health hazard and livestock losses from nagana seriously affect the local economy. Epidemiology is characterized by periods of quiescence and flare-up, reflecting intermittent vector control measures to reduce transmission. The situation has been aggravated in recent years by extension of tsetse habitat and encroachment of settlements to the park. In 1981, an attempt at tsetse eradication by insecticidal methods was unsuccessful, due to technical difficulties and for reasons to do with the resilience of a large, entrenched tsetse population living under environmental optimal conditions. The options for dealing with the disease are outlined, and some of the critical assessments which have to be made are elaborated upon.
Kenaf, Hibiscus cannabinus L., is grown in many parts of the Sudan as a fibre plant. During its various stages of growth, 17 different species of insects were detected, out of which only the cotton flea beetle Podagrica puncticollis Weise is of economic importance. The attack by this pest is most serious in the seedling stage; late sowings coupled with early light showers suffer the heaviest damage. In the leaves the beetles eat out round holes ('shot-hole effect'). The entire life cycle takes about 4 to 5 weeks, and about five generations are completed on the plant depending on the weather conditions. Cultural practices incorporating early sowing and eradication of the main host plants, Hibiscus esculentus and Abutilon spp., considerably reduce the size of the initial infestation. Chemicals tested as seed-dressing or sprays for the control of the beetle failed to give good results. However, granular insecticides showed a better performance and longer residual effect. Disyston 5G was effective for six weeks and also improved the general condition of the plants.