O estudo foi realizado em duas áreas antropizadas (Fazenda Areão e Monte Olimpo) do campus “Luiz de Queiroz”, em Piracicaba, SP. Foram analisados os dados de 52 coletas em 14 armadilhas tipo McPhail distribuídas nas duas áreas. Foram coletadas 1.583 fêmeas pertencentes a 14 espécies: Anastrepha amita Zucchi, A. barbiellinii Lima, A. bistrigata Bezzi, A. daciformis Bezzi, A. distincta Greene, A. fraterculus (Wiedemann), A. grandis (Macquart), A. manihoti Lima, A. montei Lima, A. obliqua (Macquart), A. pickeli Lima, A. pseudoparallela (Loew), A. serpentina (Wiedemann) e A. sororcula Zucchi. Na Fazenda Areão, foram coletados mais espécimes (1.041) do que no Monte Olimpo (542). A média de sobreposição de nicho foi maior que o esperado ao acaso para as duas áreas, portanto, os nichos ecológicos das espécies, em grande parte, se sobrepõem. Pelo padrão de coocorrência, a segregação não foi aleatória entre dois pares de espécies: A. pseudoparallela x A. obliqua (Fazenda Areão) e A. fraterculus x A. pseudoparallela (Monte Olimpo). A segregação indicou que pode haver competição por algum recurso em cada nicho. A análise também apresentou três pares agregados: A. bistrigata x A. montei e A. fraterculus x A. barbiellinii (Fazenda Areão) e A. fraterculus x A. bistrigata (Monte Olimpo), indicando que cada par ocorre concomitantemente, sem que haja interferência na permanência das populações dessas espécies nas áreas.

The host selection behavior is essential to studies of plant-insect interaction, considered as a critical step to populations maintenance since it directly influences the offspring development. This work describes the sexual and oviposition behavior of the invasive species Ceratitis capitata (Wied.) (Diptera: Tephritidae) in cashew apple (Anacardium occidentale L.). The results showed that from 5.645 behavioral patterns registered, for males and females in the tests with papaya, mango, cashew apple, sprayed papaya extract and sprayed mango extract, 3.719 were activities displayed by the males and 1.935 displayed by the females. To the females, the walking activity on the cashew apple differed between the morning and afternoon shift (4.3 + 2.58 and 1.5 + 1.22). The oviposition in mango fruits (11.16) differed from all the other treatments, except from papaya (6.38). However, the quantity of obtained adults was higher in papaya fruits (97) than in mango fruits (49), reducing on the papaya (48) and mango (24) treatments exposed to the cashew apple extract. There are differences in the total number of obtained adults by treatment, showing that the cashew extract reduces the total in papaya and mango treatments.

The parasitoid Diachasmimorpha longicaudata is an important fruit fly control agent, being responsable for the pest population reduction in the field and, therefore, insecticide mitigation. The control based on natural products, as the aqueous extract produced from Agave sisalana dried residue, are candidates to be integrated to fruit flies management. However, little is known about the influence of such extracts on natural enemies. Thus, this investigation evaluated the influence of the extract from A. sisalana dried residue on D. longicaudata. The experiement was carried out following a randomized block design. For each repetition, it was used 24 guava fruits (Psidium guajava L.), all previously infested by Ceratitis capitata. The fruits were treated with the 5% extract (12 fruits). Additionally, 12 fruits treated only with water were considered the control set. All the fruits were offered in a cage for three hours, period when it was observed and quantified the number of female parasitoid visits on them. This experiment was repeated for 5 days. The quantification and sex separation of emerged parasitoid adults were made 14 days after offering the fruits. To the data analysis, as the total number of parasitoids and number of its females, it was applied the General Linear Model with Poisson distribution. There was no difference between the treatments about the number of emerged parasitoids. However, the mean of visits on the fruits differed between the tretaments, showing 3.8 to control and 2.6 to the extract treatment, suggesting a toxic effect in the last one.

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Overlap pattern and interespecific co-ocurrence of fruit flies (Diptera, Tephritidae, Anastrepha) in anthropic areas The niche overlap pattern and co-ocurrence, as well as positive and negative interactions among Anastrepha species, based on abundance matrix data and presence-absence data was evaluated. The populations of species of Anastrepha was analyzed quantitatively to evaluate its distribution and the populational fluctuation of predominant species. The study was carried out in two anthropic areas, Fazenda Areão and Monte Olimpo, at "Luiz de Queiroz" campus, Universidade de São Paulo, Piracicaba, SP. The research was based on 52 samplings obtained over 14 McPhail traps distributed in these two areas. It was captured 1,583 females belong 14 species: A. amita Zucchi, A. barbiellinii Lima, A. bistrigata Bezzi, A. daciformis Bezzi, A. distincta Greene, A. fraterculus (Wiedemann), A. grandis (Macquart), A. manihoti Lima, A. montei Lima, A. obliqua (Macquart), A. pickeli Lima, A. pseudoparallela (Loew), A. serpentina (Wiedemann) and A. sororcula Zucchi. It was collected more specimens (1,041) at Fazenda Areão, comparing with the ones at Monte Olimpo (542), that showed the highest species diversity index. Anastrepha fraterculus, A. obliqua and A. pseudoparallela were the predominant species at Fazenda Areão; at Monte Olimpo, only A. fraterculus and A. pseudoparallela were predominant. The niche overlap mean was higher than randomly expected for these two areas. Therefore, the species ecological niches mostly overlap. The coocurrence pattern indicated the ocurrence of two non-randomized pair of species that segregated: A. pseudoparallela x A. obliqua at Fazenda Areão, and A. fraterculus x A. pseudoparallela at Monte Olimpo. The segregation indicates that can exist three aggregated pairs: A. bistrigata x A. montei and A. fraterculus x A. barbiellinii at Fazenda Areão; and A. fraterculus x A. bistrigata at Monte Olimpo, indicating that each pair coexists pacifically, with no interference in the permanence of the fruit fly populations in the areas. The highest populational level occurred from August to December, when temperatures oscillated between 18 and 24°C, with the population peak in September.