Locais de coleta e distribuicao de Forcipomyia (Diptera, Ceratopogonidae) relacionadas com a floracao e frutificacao do cacaueiro na Bahia, Brasil
Studies on the collecting sites of the adult Forcipomyia spp. (Diptera, Ceratopogonidae) on adult cacao trees and the midge distribution on young cacao plantings related to flowering and pod setting were carried out at the Centro de Pesquisas do Cacau (CEPEC), Bahia, Brazil in 1972. Of the total number of Forcipomyia (Euforcipomyia) sp. pollinator species no. 2 collected, 60 per cent were resting on flower buttons of cacao, 19 per cent were females collected on staminods pollinating cacao flowers while the remaining 21 per cent were collected in sepals, petals and dry tips of leaves in equal proportions. Forcipomyia (Euforcipomyia) sp. pollinator species no. 1 was another taxon qualitatively important of which 57 per cent was collected from flower buttons, 23 per cent were females walking on staminods performing pollination, 10 per cent were recovered from petals and the remaining 10 per cent were from sepals and dry tips of leaves in about equal proportions. It has been pointed out that adults resting on different parts of cacao trees were permanently exposed to the danger of the routine plant protection practices against insects and fungi. Immature stages such as eggs, larvae, and pupae that remained hidden in their natural breeding places perhaps might escape from the effects of the insecticides locally applied. Midges and young pods that were collected suggested and aggregation of midges in trees and groups of trees, in the experimental area of CEPEC. Seventy three per cent of the total midges and 95 per cent of the total pods were found in the trees that surrounded the natural breeding places. A direct quantitative relationship between the aggregation of pods was found which is attributed to the proximity of the breeding places, as well as to the probable attractivity and/or fertility of the self-compatible flowers of SIAL-325 trees
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| Format: | biblioteca |
| Published: |
1973
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| Subjects: | THEOBROMA CACAO, FORCIPOMYIA, POLINIZADORES, HABITAT, DISTRIBUCION NATURAL, FRUCTIFICACION, FLORACION, BAHIA, BRASIL, |
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| Summary: | Studies on the collecting sites of the adult Forcipomyia spp. (Diptera, Ceratopogonidae) on adult cacao trees and the midge distribution on young cacao plantings related to flowering and pod setting were carried out at the Centro de Pesquisas do Cacau (CEPEC), Bahia, Brazil in 1972. Of the total number of Forcipomyia (Euforcipomyia) sp. pollinator species no. 2 collected, 60 per cent were resting on flower buttons of cacao, 19 per cent were females collected on staminods pollinating cacao flowers while the remaining 21 per cent were collected in sepals, petals and dry tips of leaves in equal proportions. Forcipomyia (Euforcipomyia) sp. pollinator species no. 1 was another taxon qualitatively important of which 57 per cent was collected from flower buttons, 23 per cent were females walking on staminods performing pollination, 10 per cent were recovered from petals and the remaining 10 per cent were from sepals and dry tips of leaves in about equal proportions. It has been pointed out that adults resting on different parts of cacao trees were permanently exposed to the danger of the routine plant protection practices against insects and fungi. Immature stages such as eggs, larvae, and pupae that remained hidden in their natural breeding places perhaps might escape from the effects of the insecticides locally applied. Midges and young pods that were collected suggested and aggregation of midges in trees and groups of trees, in the experimental area of CEPEC. Seventy three per cent of the total midges and 95 per cent of the total pods were found in the trees that surrounded the natural breeding places. A direct quantitative relationship between the aggregation of pods was found which is attributed to the proximity of the breeding places, as well as to the probable attractivity and/or fertility of the self-compatible flowers of SIAL-325 trees |
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