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The passion fruit plant is a host for several different phytophagous mites, mainly those belonging to the Tarsonemidae, Tenuipalpidae and Tetranychidae families. Among the Tetranychidae species are Tetranychus mexicanus (McGregor, 1950) and Tetranychus desertorum Banks, 1900. The occurrence of Tetranychus marianae McGregor, 1950 was detected on yellow passion fruit Passiflora edulis Sims f. flavicarpa Degener plants under field and greenhouse conditions at the headquarters of Embrapa Cassava & Fruits Tropical Research in Cruz das Almas County, State of Bahia, Northeast Brazil. Prior records of T. marianae on the passion fruit crop in Brazil as well as the biological aspects of this species are unknown. The study on the biology of T. marianae on P. edulis f. flavicarpa was carried out under controlled environmental condition of 25 ± 1ºC temperature, 80 ± 10% RH and 12 hours photophase. The egg to adult time span lasted 10.73 ± 0.18 days, with a 92% survival figure. The sexual ratio was 81% females. The mean female longevity was 24.53 days and the daily mean oviposition was 3.69 eggs/female. The intrinsic rate of increase (r m) was 0.172; the finite rate of increase (l) was 1.187 individuals/female/day; the mean time span of one generation (T) was 22.81 days; and the net rate of reproduction (Ro) was 50.14. A cultura do maracujazeiro é hospedeira de ácaros fitófagos pertencentes principalmente às famílias Tarsonemidae, Tenuipalpidae e Tetranychidae. Dentre as espécies de tetraniquídeos encontram-se Tetranychus mexicanus (McGregor, 1950) e Tetranychus desertorum Banks, 1900. A ocorrência de Tetranychus marianae McGregor, 1950 foi verificada em plantas de maracujá amarelo Passiflora edulis Sims. f. flavicarpa Degener, em condições de campo e casa de vegetação, na sede da Embrapa Mandioca e Fruticultura Tropical, em Cruz das Almas, BA. O registro de T. marianae na cultura do maracujá no Brasil, assim como os aspectos biológicos dessa espécie são desconhecidos. O estudo da biologia de T. marianae em P. edulis f. falvicarpa foi conduzido a 25 ± 1ºC, 80 ± 10% de UR e 12 horas de fotofase. O período de ovo a adulto durou 10,73 ± 0,18 dias, com sobrevivência de 92%. A razão sexual foi 81% de fêmeas. A longevidade média das fêmeas foi de 24,53 dias e a oviposição média diária de 3,69 ovos/fêmea. A razão intrínseca de aumento (r m) foi de 0,172, a razão finita de aumento (l) de 1,187 indivíduos por fêmea por dia, o tempo médio de uma geração (T) de 22,81 dias e a taxa líquida de reprodução (Ro) de 50,14

revista brasileira de zoologia

Biological aspects of Tetranychus marianae McGregor (Acari, Tetranychidae) reared on yellow passion fruit (Passiflora edulis Sims f. flavicarpa Deg.) leaves