Pest management

First record of Tuta absoluta (Lepidoptera: Gelechiidae) in Uganda

An invasive pest, Tuta absoluta (Meyrick) has been observed infesting tomato Solanum lycopersicum L. (Solanales: Solanaceae) in Central Uganda. The affected farmer made the report, and upon visiting the farm, we observed tiny larvae, green to cream in colour with a black head feeding on tomato leaves, fruit, as well as tender stems. Also, we saw several tiny moths resting on screen house linings. Delta traps baited with TUA-Optima® (Russell IPM) were set in and around the affected farm. Dozens of moths were attracted and trapped on the sticky surface of the traps.

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Media Type: 
Journal Article

Estimating Bird Damage to Rice in Africa: Evidence from the Senegal River Valley

Granivorous birds, mainly the Red-billed Quelea, have subsisted on cereal crops in Africa for centuries and have caused substantial damage. There is, however, limited recent evidence on their impact. We propose an indirect method to estimate bird-inflicted crop losses by fitting a production function with a damage abatement component and pest intensity slope dummies on a panel database of rice farmers in the Senegal River Valley. This allows us to estimate both bird damage and marginal productivity of bird control at different levels of bird pressure.

Media Type: 
Journal Article

Combining Ability Estimates for Tomato (Lycopersicon lycopersicum (L.) H. Karst) Resistance to Nematode (Meloidogyne spp.) in the Sudan Savannah of Nigeria

Nineteen entries consisting of seven parental lines plus twelve F1 hybrids derived from a line x tester mating design were evaluated under irrigation in a randomized complete block design (RCBD) with three replications in two locations (Gashu’a and Maiduguri) during the dry season of 2013/2014. Evaluations were done to estimates the combining ability variance, general combining ability (GCA) effect of parents and specific combining ability (SCA) effect of hybrids.

Geographic Focus: 
Media Type: 
Journal Article