Abstract
Nymphs and adults of Tingis americana Drake, 1922 were found feeding on leaves of Handroanthus heptaphyllus (Vell.) Mattos and Handroanthus chrysotrichus (Mart. ex A. DC.) Mattos in the Botanic Garden, Porto Alegre, state of Rio Grande do Sul, Brazil. This is the first record of T. americana on these host plants and in the southern Brazil. We aimed to compare the nymphal development on both hosts and to analyze the reproductive parameters on H. heptaphyllus (25 ± 1ºC; 60 ± 10% RH; 16 h photophase). The mean nymphal period (days) was shorter in individuals reared on H. heptaphyllus (12.69 ± 0.076) than on H. chrysotrichus (19.11 ± 0.208) (P < 0.0001), however, nymph viability was similar. On H. heptaphyllus, the mean embryonic period lasted 12.32 ± 0.274 days and the egg viability was 92%. The mean total and daily fecundity were 310.0 ± 19.40 eggs/female and 7.46 ± 0.302 eggs/female/day, respectively. Paired males and females showed similar longevity (P = 0.0691), while unpaired females lived longer than unpaired males (P = 0.0460).
Highlights
Emerged nymphs were individualized in Petri dishes with a leaflet of H. heptaphyllus (n = 117 individuals) or H. chrysotrichus (n = 110) inserted in agar and water, plus antifungical and antimicrobian
The mean nymphal period was shorter on insects reared on H. heptaphyllus (12.69 ± 0.076 days) than on H. chrysotrichus (19.11 ± 0.208 days) (U = 0.50; P < 0.0001)
Nymphal viability on individuals reared on H. heptaphyllus (86.3%) and on H. chrysotrichus (77.3%) was similar
Summary
Desenvolvimento ninfal comparado de Tingis americana (Hemiptera, Tingidae) em duas espécies de Handroanthus (Bignoniaceae) e parâmetros reprodutivos em mudas de Handroanthus heptaphyllus. Tingidae (Hemiptera, Heteroptera) are small insects (2–10 mm), most of them recognizable by the areolate pronotum and hemelytra (Miller, 2008) This group comprises three subfamilies: Cantacaderinae, Tinginae, and Vianaidinae, with about 2,600 species (Guilbert, 2004). Most lace bugs feed on a single or on closely related host plant species, usually on the abaxial side of Angiospermae leaves (Schuh & Slater, 1995). Their feeding habits may result in puncture marks, white spots, and/or leaf abscission (Stonedahl et al, 1992; Neal & Schaefer, 2000). Grose (Oliveira et al, 2012; Silva et al, 2012)
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