Abstract

TEPOLE-GARCIA, Rosa Elba; RAMIREZ-ROJAS, Sergio; BARTOLO-REYES, Juan Carlos  and  CASTREJON-GOMEZ, Víctor Rogelio. Life cycle and climate risk analysis of Leptoglossus zonatus Dallas (Hemiptera: Coreidae) for sorghum producing areas in the State of Morelos, Mexico. Acta Zool. Mex [online]. 2016, vol.32, n.3, pp.300-309. ISSN 2448-8445.

Leptoglossus zonatus feeds on various plants of economic importance, one of them is sorghum Sorghum bicolor (L.) Moench, main rain fed crop in the State of Morelos. Up to date there are no publications on degree days for growing development of this species, which can be used to calculate the number of generations that develop during the cycle of any crop or through one year, and thereby estimate its potential harm. In order to achieve the above, life cycle of the species was studied under three different temperature conditions: 20.4 °C, 21.56 °C, and 24.8 °C, and thereby the degree days were calculated with the method of average temperatures, as well as the number of generations in each weather station in Morelos. These data were projected onto a map of the Morelos and the level of risk of incidence of L. zonatus was located in the sorghum producing areas. In the three study conditions, the degree days for life cycle of L. zonatus lasted 164, 152 and 109 days, respectively. The calculated base temperature for this insect was 10.37 °C and the accumulated degree days to complete its life cycle were 1,680. According to historical temperature data, L. zonatus presented up to three generations per year in the sorghum growing areas in Morelos, which it is considered as a high potential risk. The municipalities of Puente de Ixtla, Amacuzac, Mazatepec, Miacatlán, Temixco, Emiliano Zapata, Xochitepec, Zacatepec, Jojutla, Tlaltizapán, Yautepec, Ayala, Jantetelco, Jonacatepec, Axochiapan, Tepalcingo, and Cuautla may be in high risk.

Keywords : Sorghum bicolor; plague; life cycle; base temperature; degree days.

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