Composition and Structure of Thripidae Populations in Crops of Three Geographical Regions in Colombia.

Abstract

The composition and structure of thrips populations were determined in agroecosystems of 10 crops in the Andean, Caribbean, and Orinoquia regions of Colombia. From 18,183 identified specimens, 81 species belonging to 20 genera and three families were found. The Andean region was the most diverse with 60 species (n = 11,360, Chao 1 = 70.5, H′ = 1.986), followed by the Caribbean region with 42 (n = 5,960, Chao 1 = 57.6, H′ = 2.256) and the Orinoquia with 24 (n = 863, Chao 1 = 31; H′ = 2.301). The crop with the richest fauna was avocado (Persea americana) Mill. with 40 species (n = 4,047, Chao 1 = 55.17, H′ = 1.302), followed by coffee (Coffea arabica) L. with 26 (n = 1,395, Chao 1 = 33; H′ = 1.026), cassava (Manihot esculenta) Crantz. with 25 (n = 1,050, Chao 1 = 29.67, H′ = 1.635), citrus (Citrus spp.) with 22 (n= 836, Chao 1 = 25.75, H′ = 1.748), corn (Zea mays) L. with 22 (n = 1,647, Chao 1 = 24.5, H′ = 1.365), mango (Mangifera indica) L. with 17 (n = 1,144, Chao 1 = 18.5, H′ = 1.303), blackberry (Rubus glaucus) Bentham. with 11 (n = 545, Chao 1 = 16, H′ = 0.886), banana (Musa spp.) with 9 species (n = 1,798, Chao 1 = 9, H′ = 0.208), cotton (Gossypium hirsutum) L. with 8 (n = 5,621, Chao 1 = 11, H′ = 0.913), and rubber tree (Hevea brasiliensis) Müll.Arg. with 4 species (n = 90, Chao 1 = 4, H′ = 0.594). Differences were found in the distribution of the species in the altitudinal gradients and in the biogeographical regions. Frankliniella gardeniae Moulton, was the most abundant species, with the highest presence in crops, the greatest geographic and altitudinal distribution.