Polinização entomófila de abobrinha, Cucurbita moschata (Cucurbitaceae)

Abstract

-The objectives of this work were to determine the squash entomofauna in the region of Viçosa, Minas Gerais state, to study their behavior on fl owers and their importance for pollination, verifying the role of each pollinator. The most common species were Trigona spinipes (Fabricius), Trigona hyalinata (Lepeletier), Apis mellifera (L.) and Melipona quadrifasciata (Lepeletier). The visitation behavior of A. mellifera, M. quadrifasciata, and Bombus morio (Swederus) were similar. They visited fl owers for nectar collection, positioning themselves vertically between the corolla and the sexual structures of the fl owers, with the back directed toward the fl oral axis, which permitted the removal of pollen from the anthers of fl owers with stamens and its deposition on the stigma of fl owers with pistils, being considered therefore effective pollinators. Trigona spinipes and T. hyalinata foraged in groups, preventing other species from landing on the fl owers which they occupied. Due to their small body size and only infrequent contact with the sexual structures of the fl owers, these species are considered occasional pollinators. The number of fruits produced differed between freely visited fl owers, those prevented from receiving visits and those visited only a single time by M. quadrifasciata, B. morio, A. mellifera, T. hyalinata or T. spinipes. Flowers prevented from receiving visits or visited only once by T. spinipes did not produce fruits. The remaining pollination systems led to fruitifi cation, with open pollination or a single visit from either M. quadrifasciata or B. morio leading to most fruit production.

Spatial Distribution of Phytophagous Insects, Natural Enemies, and Pollinators onLeucaena leucocephala(Fabaceae) Trees in the Cerrado

“…T. angustula bitaceae) flowers only visited once by T. spinipes produced no fruit, which may be due to insufficient amounts of pollen carried by workers of this bee species (Serra & Campos 2010). Their small body size is also important, because these bees only occasionally touch the stamens and stigmas, thereby reducing the chance of successful pollination.…”

“…Their small body size is also important, because these bees only occasionally touch the stamens and stigmas, thereby reducing the chance of successful pollination. In addition, these bees visit the flower individually, without group behavior, a foraging pattern characteristic of this species on other plants (Serra & Campos 2010). Thus, as pollinator, T. spinipes contributes little to fruit production (Serra & Campos 2010).…”

“…In addition, these bees visit the flower individually, without group behavior, a foraging pattern characteristic of this species on other plants (Serra & Campos 2010). Thus, as pollinator, T. spinipes contributes little to fruit production (Serra & Campos 2010). In addition, the phytophagous species T. collaris can damage wild plant species, including palm, fruit, grain, and Casuarina glauca Sieber ex Spreng (Casuarinaceae) trees (Costa et al 2003).…”

Bees biodiversity, forage behavior and fruit production in gherkin crop (Cucumis anguria L.)

“…Among these insects, bees are the most abundant group of pollinators in agriculture visiting over 90% of the 107 main agricultural crops (Klein et al, 2006). Among the agricultural crops, a group of plants studied for pollination is the Cucurbitaceae family which mostly have separate female and male flowers, being dependent on pollinators to ensure the production of their fruits (Serra & Campos, 2010).…”

OCORRÊNCIA DE Pseudomonas syringae pv. lachrymans, E USO DE BIOPESTICIDAS NO CONTROLE DE MANCHA ANGULAR NA ABOBRINHA “MENINA BRASILEIRA”

“…A família cucurbitácea, com cerca de 90 gêneros e 750 espécies adaptadas ás regiões tropicais e subtropicais de ambos os hemisférios, possui diversas espécies de importância econômica e alimentar, como por exemplo, Cucurbita moschata (SERRA & CAMPOS, 2010).…”