Dagoberto Guillén-Sánchez

Population Dynamics of Mexican Rice Borer, Eoreuma loftini (Dyar)1, Using a Pheromone Trap System in Sugarcane, Saccharum officinarum L., in Morelos, México

Abstract. The Mexican rice borer, Eoreuma loftini (Dyar) (Lepidoptera: Crambidae), is one of the most important pests of sugarcane, Saccharum officinarum L., in Mexico, but the population dynamics of the adult are not known for conditions in the state of Morelos. During the 2013 season, 11,282 adult males were caught, with the largest number of adults trapped on the eastern and western sides of the state. Two population peaks were observed, the first during the dry season (February-June) and the second during the rainy season (October- December). Implementing monitoring of this stalk borer as part of an integrated pest management program is discussed.

Hosts of five Anastrepha Species (Diptera: Tephritidae) in the State of Quintana Roo, Mexico

Summary Host plant records are reported for 5 species of Anastrepha (Diptera: Tephritidae) collected from wild and commercial fruit species in the Mexican state of Quintana Roo.

Xylophagous Beetles (Coleoptera: Buprestidae and Cerambycidae) from Ficus carica L. (Moraceae) in Morelos, Mexico

Abstract Xylophagous buprestid (Coleoptera: Buprestidae) and cerambycid beetles (Coleoptera: Cerambycidae) associated with common fig or “higuera”, Ficus carica L. (Moraceae), were studied in small orchards from Morelos, Mexico. Three species of Buprestidae and 11 species of Cerambycidae were identified. The cerambycids Eutrichillus comus Bates and Neoptychodes trilineatus (L.) were the most prevalent and abundant species reared from the sampled orchards. Ficus carica is recorded for the first time as a host for the buprestids Acmaeodera rustica Fischer, Chrysobothris analis LeConte, and Chrysobothris distincta Gory and the cerambycids Anelaphus piceum (Chemsak), E. comus, Lagocheirus obsoletus obsoletus Thomson, Sphaenothecus trilineatus Dupont, and Stenosphenus rufipes Bates. The role of xylophagous insects in the phytosanitary conditions of this fruit crop is discussed.

Atracción de Aphis nerii a Combinación de Colores bajo Condiciones de Laboratorio

Resumen. El pulgón Aphis nerii Boyer de Fonscolombe (Hemiptera: Aphididae) es una plaga importante de la papaya, Carica papaya L. en México debido a su papel como vector del Virus de la Mancha Anular del Papayo (PRSV-p). El monitoreo de poblaciones de pulgones se realiza en campo con trampas pegajosas amarillas, sin embargo se desconoce el color de preferencia de A. nerii. Por lo que se evaluó bajo condiciones de laboratorio, el tiempo de arribo y la permanencia de adultos alados a la combinación de dos colores (amarillo, rojo, blanco, o verde) dispuestos de manera contínua o alterna. Aphis nerii arribó en menor tiempo a colores claros cuando éstos fueron mostrados de forma continua, excepto en la combinación rojoverde, donde arribó más rápido al rojo. El arribo a colores claros también se mantuvo cuando fueron mostrados de manera alterna, aunque sin diferencias significativas. No se observaron diferencias en cuanto tiempo de permanencia en algún color en particular, aparentemente la preferencia es por colores claros. Cuando se contrastan amarillo-blanco y rojo-blanco, A. nerii reposa por mayor tiempo en blanco. En el campo se sugiere emplear trampas de color claro para el monitoreo de A. nerii.

Comportamiento de Híbridos de Sorghum bicolor (L.) Moench, Frente a Melanaphis sacchari/sorghi 1 en el Estado de Morelos, México

Abstract. Some studies have reported the low genetic differentiation of Melanaphis sacchari/sorghi and its great phenotypic plasticity to quickly undergo adaptive changes that include change of host and rapid dispersion. In this experiment, damage and behavior of six commercial Sorghum bicolor (L.) Moench hybrids, against attack by the aphid were evaluated at Xalostoc, Morelos. The incidence of the sugarcane aphid from 21 after days sowing (ADS) was observed in all genotypes, despite insecticides coating the seed. The intensity of attack was light (25%) to 35 ADS. The intensity increased at the 49 ADS to (grade 2), with least severity in the Ambar hybrid (50.6%) and the greatest for Milenia (65%). The aphid was most abundant at 56 ADS, with P20 (85%) and Milena (83.7%) the most affected hybrids. At the end of the crop cycle, two groups were formed, the least infested (85 P15, Ambar, and DKS-46) and the most damaged one (Milenia, Cobalt, and 85 P20). Agronomic variables such as fresh weight of the plant, plant height, tang weight, and dry weight of the plant were not different. There were differences only in the brix degrees, with low values for Ambar (3.5°Bx) and P15 (4.2°Bx) hybrids, significantly different from 85 P20 (6.9) and Milena (6.5°Bx).