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1 June 2002 SCYPHOPHORUS ACUPUNCTATUS (COLEOPTERA: CURCULIONIDAE) ATTACKING POLIANTHES TUBEROSA (LILIALES: AGAVACEAE) IN MORELOS, MEXICO
Mario Camino Lavin, Victor R. Castrejon Gomez, Rodolfo Figueroa Brito, Lucila Aldana Llanos, MaElena Valdes Estrada
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Tuberose, Polianthes tuberosa L. (Liliales: Agavaceae), is grown as an ornamental plant and as a source of a fragrant essence for perfumes (Gonzatti 1981, Watson & Dallwitz 1992). It has been grown commercially in the state of Morelos, Mexico, for 60 years. Currently there is grown approximately 300 cultivated ha, which generates US $6,300,000 per year (Uribe 2000). However, in recent years, producers have noticed severe damage caused by an insect that they call black weevil but unidentified scientifically. The objective of this work was to identify the pest and to assess damage.

The study was carried out in the central Mexican state of Morelos, between 18°22’19” and 19°07’10” north and between 99°30’8” and 19°07’10” west. Mean annual temperature is 20°C and the annual rainfall ranges from 900 to 1100 mm (García 1981). Samples were collected from March to September 2000 in the main areas of tuberose production to include: the municipalities of (1) Tepalcingo, (2) Emiliano Zapata, and (3) Coatlán del Río.

In the first two municipalities, 100 bulbs of P. tuberosa were collected, whereas in the third, 120 plants were collected. A 1-ha plot in each municipality was selected, and samples were taken from the center and four sides of the plot. In the laboratory, bulbs and whole plants were examined for insects. The insect larvae and adults were deposited in 70% ethanol and processed for identification (see acknowledgments).

The weevil was identified as Scyphophorus acupunctatus Gyllenhal (Coleoptera: Curculionidae) (Muñíz 2000, Marín 2000, Nápoles & Equihua 2000). Most damage is caused by weevil larvae mining the bulb. The samples from Coatlán del Río had the highest incidence of damage (69%). Emiliano Zapata and Tepalcingo demonstrated 47 and 37% damage, respectively (Table 1).

This paper is the first formal report of S. acupunctatus attacking tuberose. Vaurie (1971), in her revision of Scyphophorus, did not mention tuberose as a host plant of S. acupunctatus. Dampf mentioned the weevil as “acapiche del nardo” (Anonymous 1930). Vaurie (1971) mentions that this insect is distributed from the southern USA to the north of South America, the Caribbean (Cuba, Hispaniola, and Jamaica), East Africa, Hawaii, Java, and Australia. In Mexico it has been reported attacking several economically important plants of the family Agavaceae (McGregor & Gutiérrez 1983). In the Yucatán peninsula it has been mentioned as causing damage up to 50% in the cultivation of henequen (Agave fourcroydes Lem.) (Ramírez-Choza 1979). In the states of Hidalgo, Tlaxcala, and México, it has been reported causing damage of 30% to the cultivated plant “maguey pulquero” (Agave salmiana Salm-Dyck ssp. crassispina (Trel.) Gentry and var. culta) (Ruvalcaba 1983). In the state of Jalisco, it caused damage of 10% to “agave tequilero” (Agave tequilana Weber var. azul) (Valenzuela 1994). In the municipalities of Tepalcingo and Coatlán del Río, cultivation of A. tequilana began three years ago, whereas in Emiliano Zapata there are wild agaves, predominantly A. angustifolia Haw., in the hills near cultivated P. tuberosa. These two agaves may serve as refuge to S. acupunctatus during chemical applications or when tuberose is not in the field, so control is complicated (Uribe 2000). Infestations in Agave tequilana var. azul have been reported as from 4 to 24 weevils per plant (Solis et al. 1999). The present survey showed 6-10 larvae per infested bulb and 4-36 adults per infested plant. S. acupunctatus is a severe pest of tuberose. Our work continue on S. acupunctatus life cycle, population dynamics, identification and evaluation of feeding attractants.

We thank Dr. J. H. Frank (Entomology and Nematology Department, University of Florida) for guidance and corrections to a manuscript draft. This report was supported financially by Fundación Produce Morelos, A. C. (project number 4-I/A18/2000). We also thank Unión de Productores de Nardo del Estado de Morelos, through Mr. Rodolfo Uribe Landa. We thank R. Muñíz, A. Marin and Dr. J. Nápoles and Dr. A. Equihua for identification of the insects. The authors of this paper are scholarship awardees of Comisión de Operación y Fomento de Actividades Académicas del Instituto Politécnico Nacional.

Summary

Scypophorus acupunctatus is reported attacking Polianthes tuberosa in Morelos, Mexico. All growth stages (eggs, larvae, pupae and adults) of this insect were collected. The average percent infestation was 51%.

This paper is in memory of Dr. Mario Camino Lavín.

References Cited

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Appendices

Table 1. Infestation of S. acupunctatus in P. tuberosa in Morelos, Mexico (March to September 2000).

i0015-4040-85-2-392-t01.gif
Mario Camino Lavin, Victor R. Castrejon Gomez, Rodolfo Figueroa Brito, Lucila Aldana Llanos, and MaElena Valdes Estrada "SCYPHOPHORUS ACUPUNCTATUS (COLEOPTERA: CURCULIONIDAE) ATTACKING POLIANTHES TUBEROSA (LILIALES: AGAVACEAE) IN MORELOS, MEXICO," Florida Entomologist 85(2), 392-393, (1 June 2002). https://doi.org/10.1653/0015-4040(2002)085[0392:SACCAP]2.0.CO;2
Published: 1 June 2002
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