Browsing Research Publications by Author "Gitonga, Linus"
Now showing items 1-9 of 9
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Biological impact of the exotic parasitoid, Diadegma semiclausum (Hellen), of diamondback moth, Plutella xylostella L., in Kenya
Momanyi, Caleb; Loehr, Bernhard; Gitonga, Linus (Karatina University, 2006-08)Diadegma semiclausum (Hellen) was introduced to Kenya from Taiwan for the control of diamondback moth (DBM), Plutella xylostella L., and released for the first time in July 2002. Seven and twelve months after release, ... -
Evaluation of biological attributes of a native egg parasitoid, Trichogrammatoidea sp. nr. lutea (girault), kenyan accessions
Lagat, Zipporah Osiemo; Gitonga, Linus; Muya, Shadrack Muvui; Ng ' Endo, Rossa (2012-09-10)Objective: This study was carried out to evaluate the biological attributes that is, parasitism, adult progeny production, and sex ratio of 21 strains of a native egg parasitoid Trichogrammatoidea sp. nr. lutea Girault ... -
Home Sustainable Management of Invasive Pests in Africa Chapter Influence of Predatory Mites, Phytoseiulus longipes Evans. on the Within-Plant Diurnal Migration and Distribution of the Red Spider Mite, Tetranychus evansi, Baker and Pritchard on African Nightshade, Solanum scabrum
Kungu, Miriam; Subramanian, Sevgan; Salifu, Daisy; Fiaboe, Komi K. M.; Azandémè-Hounmalon, Ginette Y.; Gitonga, Linus; Onyambu, Gladys K.; Deletre, Emilie; Martin, Thibaud (Springer, 2020-07-14)Understanding the within-plant diurnal migration and distribution of the Red spider mite, Tetranychus evansi Baker and Pritchard, in the presence of the predatory mite Phytoseiulus longipes Evans, on African nightshade, ... -
A new mite IPM strategy: predator avoidance behaviour resulting from the synergetic effects of predator release and acaricide‐treated nets
Kungu, Miriam; Deletre, Emilie; Subramanian, Sevgan; Fiaboe, Komi Km; Gitonga, Linus; Lagat, Zipporah Osiemo; Thibaud, Martin (Wiley, 2018-10-26)Background: Tetranychus evansi and T. urticae spider mites are known major pests of Solanaceae. Smallholders in Africa rely heavily on pesticide treatments. However, farmers claim that pesticides are generally ineffective ... -
Preventive control alternatives to routine foliar spray against Thrips tabaci in onions
Waiganjo, M.; Sithanantham, S.; Gitonga, Linus; Mueke, J. M. (2008-10)- -
Scope for genetic enhancement of the parasitisation potential of four native strains of Trichogrammatoidea sp. nr. lutea Girault (Hymenoptera: Trichogrammatidae
Baya, Joseph M.; Sithanantham, S.; Gitonga, Linus; Osir, Ellie (Taylor & Francis, 2007-09)In response to emerging interest in commercial mass production of Trichogramma for Helicoverpa armigera biocontrol in eastern Africa, laboratory experiments were undertaken to assess the scope for genetic enhancement of ... -
Species Composition, Distribution, and Seasonal Abundance of Liriomyza Leafminers (Diptera: Agromyzidae) Under Different Vegetable Production Systems and Agroecological Zones in Kenya
Foba, Caroline; Salifu, Daisy; Osiemo Lagat, Zipporah; Gitonga, Linus (Karatina University, 2015-04)A longitudinal study to identify the species of Liriomyza leafminer, their distribution, relative abundance, and seasonal variation, including their host range, was conducted in vegetable fields at three altitudes in ... -
SUSCEPTIBLE ONION GROWTH STAGES FOR SELECTIVE AND ECONOMIC PROTECTION FROM ONION THRIPS INFESTATION
Waiganjo, M.M; Mueke, J.M.; Gitonga, Linus (Karatina University, 2008-03)The growth of the bulb onion is subject to significant stress and yield reduction caused by sap feeding onion thrips. In Kenya, the general control recommendation is to spray the crop with insecticides as soon as the ... -
Temperature-dependent development of Megalurothripssjostedti and Frankliniellaoccidentalis (Thysanoptera: Thripidae)
Gitonga, Linus; Lohr, B.; Overholt, Bill; Magambo, J. K. (2002-09)Megalurothrips sjostedti (Trybom) and Frankliniella occidentalis (Pergande) (Thysanciptera: Thripidae) are among the most serious pests of French beans, Phaseolus vulgaris var. Monel in Kenya and occur in all major growing ...