ResumoBiologia de Neoseiulus californicus alimentando-se de ácaro rajado. Tetranychus urticae (Koch) destaca-se por ser um ácaro polífago. Em morangueiro, esse ácaro desenvolve-se na face inferior das folhas, causando lesão significativa. Este estudo teve por objetivo conhecer as características biológicas de Neoseiulus californicus (McGregor), proveniente de plantas de morangueiro cultivado. O estudo iniciou-se com trinta ovos individualizados em arenas com diferentes estágios de T. urticae como alimento. A duração média de ovo-adulto foi maior para fêmeas (5,69±0.08) do que para machos (5,35±0.11). A razão sexual foi de 0,66 e capacidade inata de aumento (rm) foi de 0,15 fêmea/fêmea/dia. A taxa líquida de reprodução (R o ) foi 17,10 vezes/geração, com uma média a cada geração (T) de 19,35 dias. Maior oviposição foi observada no 11º dia após o seu início, com 2,7 ovos/fêmea/dia e a média foi de 38,14±5,58 ovos/fêmea. A razão finita de aumento (λ) foi 1,41 fêmea/ dia. Neoseiulus californicus mostrou reproduzir-se adequadamente quando alimentado com T. urticae. Palavras-chave: Controle biológico; Fragaria sp.; Inimigo natural; Tabela de vida; Tetranychus urticae AbstractTetranychus urticae (Koch) stands out as a polyphagous mite. In a strawberry plant, this mite develops on the underside of leaves, causing a significant injury. This study aimed to know the biological characteristics of Neoseiulus californicus (McGregor), from cultivated strawberry plants. The study started with thirty eggs isolated in arenas with different stages of T. urticae. The average length of egg-adult was higher for females (5.69±0.08) than for males (5.35±0.11). The sex ratio was 0.66 and the innate capacity for increase (rm) was 0.15 female/ female/day. The net reproductive rate (R o ) was 17.10 times/generation, with an average to each generation (T) of 19.35 days. Greater oviposition was observed at the 11 th day after its onset, with 2.7 eggs/female/day and the average was 38.14±5.58 eggs/female. The finite increase rate (λ) was 1.41 female/day. Neoseiulus californicus showed to reproduce properly when feeding on T. urticae.
Hypoganus wennae sp. nov. is described and illustrated from Yunnan, China. Notes on the genus from the Palaearctic region are given. A distribution map of Chinese Hypoganus species is provided, along with a key and a checklist of the species from Palaearctic region. Habitats of Hypoganus species are illustrated.
ABSTRACT. Phytoseiulus macropilis (Banks) (Phytoseiidae) is a natural enemy of Tetranychus urticae Koch (TSSM), a common pest in several cultures, especially in greenhouses. This research aimed to know the biological parameters of a strain of P. macropilis from Vale do Taquari, State of Rio Grande do Sul, feeding on TSSM at different temperatures. The study was initiated with 30 eggs individualized in arenas under the temperature of 20, 25 and 30 ± 1°C and relative humidity of 80 ± 10%. The average length (T) of each generation decreased with the increase of temperature, ranging from 25.71 days at 20°C to 11.14 days at 30°C. The net reproductive rate (Ro) ranged from 45.47 at 20°C to 18.25 at 30°C; the innate capacity for increase (rm) was 0.15 at 20°C, reaching 0.26 at 30°C and the finite increase rate (λ) ranged from 1.41 to 1.82 females day -1 at 20 and 30°C, respectively. In the present study, it was observed that the strain of the evaluated predatory mite from mild climate of South Brazil, might present a good performance to control TSSM when exposed to a temperature range between 20 and 30°C.Keywords: agroecology, strawberry, Tetranychus urticae, two-spotted spider mite.Efeito da temperatura sobre a biologia de Phytoseiulus macropilis (Banks) (Phytoseiidae) em programa de controle biológico aplicado RESUMO. Phytoseiulus macropilis (Banks) (Phytoseiidae) é um inimigo natural de Tetranychus urticae Koch (ácaro rajado), uma praga comum em diversas culturas mantidas em estufas. Esta pesquisa teve o objetivo de conhecer características biológicas de uma linhagem de P. macropilis do Vale do Taquari, Rio Grande do Sul, que se alimenta do ácaro rajado em diferentes temperaturas. O estudo foi iniciado com 30 ovos individualizados em arenas nas temperaturas de 20, 25 e 30 ± 1°C e umidade relativa de 80 ± 10%. A duração média (T) de cada geração diminuiu com o aumento da temperatura, variando de 25,71 dias, a 20°C, e 11,14 dias, a 30°C. A taxa líquida de reprodução (R o ) variou de 45,47, a 20°C, para 18,25, a 30°C; a capacidade inata de crescimento (r m ) foi de 0,15, a 20°C, atingindo 0,26, a 30°C, e a taxa de aumento finito (λ) variou 1,41 até 1,82 fêmeas/dia, a 20 e 30°C, respectivamente. No presente estudo, observou-se que a estirpe de predador avaliada, de clima ameno do Sul do Brasil, pode apresentar um bom desempenho para controlar TSSM quando exposta a temperatura entre 20 e 30°C.Palavras-chave: agroecologia, morango, Tetranychus urticae, ácaro rajado.
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