Chilli thrips, Scirtothrips dorsalis (Hood), is an important pest of crops in tropical and subtropical regions. Female S. dorsalis insert their eggs inside plant \൴issue. Nature of damage 11. Vector 12. Scirtothrips dorsalis receives a High (3) in this category. 2009a). Management 5. Host range 4. The eggs hatch in 6–8 days. The thrips is reported to disperse only 12-20m on its own 1, but it may spread long distance in commerce on plants or plant parts. They pass through two larval stages \⠀㄀猀琀 愀渀搀 ㈀渀搀 椀渀猀琀愀爀猀尩 that last for 6–7 days. Scientific Classification 8. Life cycle 10. Yield loss 6. Present: In the United States, the Chilli Thrip Scirtothrips dorsalis, is a relatively new, introduced insect pest in Florida and Texas. - Japanese Journal of Applied Entomology and Zoology 39 … Gravid females insert the eggs inside plant tissues above the soil surface. ... Life Cycle. Tsuchiya, M, Masui, S & Kuboyama, N (1995): Reduction of population density of Yellow Tea Thrips (Scirtothrips dorsalis Hood) on Mandarine Orange (Citrus-Unshiu Marc.) Average time for life cycle stages includes the following: ... U.S. OUTPUTS: Life table and other parameters of the chilli thrips, Scirtothrips dorsalis were studied in a greenhouse at Homestead, Florida. Area and Distribution 5. It is highly polyphagous (including kiwifruit) and with a Life Cycle and Biology The life cycle stages of S. dorsalis include egg, first and second instar larvae, prepupa, pupa and adult. Host Plant: Scirtothrips dorsalis is a polyphagous species with more than 100 recorded hosts from about 40 different families. The life cycle stages of S. dorsalis include egg, first and second instar larvae, prepupa, pupa and adult. Scientific name : Scirtothrips dorsalis Order : Thysanoptera Family : Thripidae 4. Life History of Pest Thrips 30 to 40 days for a complete generation 6, 5, and 5 days for development of egg, larva, and pupa Pollen doubles or triples fecundity Strong aggregation tendencies for flowers of Thrips and Frankliniella species Scirtothrips aggregate on young foliage and flowers trees by application of white solution with/without reflective sheet mulching. The eggs are microscopic (0.075 mm long and 0.070 mm wide), kidney-shaped and creamy white in color (Seal et al. The life cycle for S. dorsalis is similar to that of western flower thrips. 3) Pest Dispersal Potential: Chilli thrips reproduces rapidly: each female lays 60-200 eggs and the thrips completes its life cycle in 12-22 days 2. ETL 7. Gravid females lay eggs inside the plant tissue (above the soil surface) and eggs hatch between 5-8 days depending upon environmental conditions [12, 16]. Description & Life cycle Assessment of risk High Priority Organism: Scirtothrips dorsalis (Chilli thrips) the aerial parts of the plant, causing the growing partsto distort and discolour and in serious infestations to totally defoliate the plant. 1. Mean numbers of larvae per plant were significantly higher on pepper and on the rose cultivar, Knockout, than on bean, eggplant, squash and tomato. An established population of this pest was first detected in the United States on landscape roses in Florida in 2005. The stages of the life cycle of S. dorsalis include the egg, first and second instar larva, prepupa, pupa and adult. Introduction 2. The life cycle is similar to Western Flower Thrips, with the entire life cycle complete within 14 to 20 days. Marks of Identification 9. During th對is time they actively feed on the host plant. Gravid females insert the eggs inside plant tissues above the soil surface. Economic Important 3. 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