The number, external morphology, and distribution of antennal sensilla of Zamagiria dixolopella Dyar were determined by light and scanning electron m

We designed 2 papaya groves to test the concepts of trap cropping and border trapping to control Toxotrypana curcicauda . Intensive fruit sampling in grove 1 indicated that the degree of fruit infestation decreased as the distance from the native vegetation (source of flies) increased. Rows planted 10 m away from the main block of papaya trees (trap crop) exhibited the greatest degree of puncture damage and larval infestation in both experimental groves. Fruit damage was highest after the rainy season was over and was spatially aggregated. We conclude that designing a papaya grove in such a way that a trap crop consisting of plants located 10 m from the main block of trees (and entirely surrounding it) can reduce fly damage significantly. If pheromone-baited fly traps are hung in these peripheral rows, the trap crop effect can be enhanced, and as a result, damage to the commercial block of trees can be reduced even further. Such a fly management scheme should allow growers to avoid or drastically reduce pesticide applications. We discuss our findings in relation to current knowledge of T. curvicauda behavior and make suggestions for further improvement and large scale testing of the management scheme we propose.

Antennal morphology, types of sensilla, and their distribution have been investigated in Talponia batesi Heinrich (Lepidoptera: Tortricidae) by using

The antennal flagellum of the melolontid beetle Phyllophaga obsoleta Blanchard consists of three terminal plates of lamellae: proximal, middle, and distal. Six types of sensilla were identified on the internal and external surfaces of lamellae from both sexes: placodea (PLAS), basiconica (BAS), coeloconica (COS), auricilica (AUS), chaetica (CHS), and trichodea (TRS). The first four types have been considered as chemoreceptor sensilla and the last two as mechanoreceptor sensilla. The sensilla from the internal and external surfaces of each of three lamellae present in the antennal club from both sexes were mapped by scanning electron microscopy. PLAS were abundant and followed a uniform pattern of distribution on both internal and external surfaces of lamellae from both sexes. Males antennae present a higher number of PLAS in comparison with females antennae. BAS are more abundant in males than in females and follow a more aggregated distribution than PLAS. AUS were included within the BAS group. COS are scarce and only observed on the internal surfaces of all lamellae. TRS and CHS are only present on the periphery of the lamellae. Most sensillar types identified were more abundant in males than in females. The higher number of PLAS observed in males lamellae compared with females lamellae suggests that these sensilla may be involved in sex pheromone reception.

We quantified within-orchard distribution patterns and diel patterns of oviposition, male calling, mating, feeding, and resting behaviors of wild papaya fruit flies, Toxotrypana curvicauda Gerstaecker, in experimental and commercial papaya orchards in the states of Morelos and Veracruz, Mexico. Essential resources (e.g., oviposition substrates, sites to perform sexual activities, food, shelter) were identified in both papaya plantations and in adjacent native vegetation. In papaya monocrops, T. curvicauda adults fly back and forth between native vegetation and papaya plantations. They enter plantations in the morning and leave them in the afternoon. As a consequence, the highest proportion of individuals was sighted in border rows (those closest to native vegetation). If papaya plantations are mixed (papaya, mango, avocado, guanabana), both within-orchard distribution and daily movement patterns differ when compared with those observed in papaya monocrops. Here, most flies are seen in areas next to mango or avocado trees (shelter sites) and not in plantation borders. We discuss our findings in light of their practical implications.

Mario Camino Lavin, Victor R. Castrejon Gomez, Rodolfo Figueroa Brito, Lucila Aldana Llanos, and MaElena Valdes Estrada (2002) SCYPHOPHORUS ACUPUNCTATUS (COLEOPTERA: CURCULIONIDAE) ATTACKING POLIANTHES TUBEROSA (LILIALES: AGAVACEAE) IN MORELOS, MEXICO. Florida Entomologist: Vol. 85, No. 2, pp. 392-393. https://doi.org/10.1653/0015-4040(2002)085[0392:SACCAP]2.0.CO;2