Open Access
1 December 2014 Effects of Temperature on the Development of Stenoma impressella (Lepidoptera: Elachistidae) on Oil Palm in Colombia
Luis C. Martínez, Angelica Plata-Rueda, José C. Zanuncio, Genésio T. Ribeiro, José Eduardo Serrao
Author Affiliations +

Stenoma impressella Busck (Lepidoptera: Elachistidae) is an important oil palm pest and its life history and life table parameters were studied at various temperatures, from 16 °C to 40 °C. Females and males developed successfully into adults between 20 °C and 36 °C. However, no eggs were found at 10 °C and all the adults died after exposure to 40 °C. The developmental time from egg to adult was higher (170.5 days) at 15 °C and lower (76.6 days) at 35 °C. Therefore, temperature has a strong effect on the development of S. impressella from 15 °C to 35 °C. The reproductive period varied between 15–35 °C with 6.82 to 3.24 days for pre-oviposition, 17.5 to 4.89 days for oviposition, and 5.29 to 0.82 days for the postoviposition period. Female longevity was longer than that of the male, at all temperatures. The population growth parameters of S. impressella net reproductive rate (R0), intrinsic rate increase (rm), finite increase rate (λ), mean generation time (T) and doubling time (D) were significantly affected by temperature. Temperature affects S. impressella populations by reducing or increasing their possible occurrence in the palm trees. The effect of temperature on the development, survival and reproduction of S. impressella can be useful for predicting its long-term population fluctuation as an invasive pest of oil palm plantations.

Stenoma impressella Busck (Lepidoptera: Elachistidae) is a pest of oil palm (Elaeis guineensis Jacquin; Arecales: Arecaceae) with the larvae defoliating the oil palm plantations in Colombia, Costa Rica, Ecuador, Honduras, Panamá, Peru and Venezuela (Genty et al. 1978; Howard et al. 2001; Martínez & Plata-Rueda 2013). The larvae of S. impressella are associated with Pestalotiopsis (Xylariales: Amphisphaeriaceae) a fungal disease in oil palm plantations from Colombia (Martínez & Plata-Rueda 2013). Stenoma impressella, a highly polyphagous caterpillar, is a known pest of Citrus sinensis (Osbeck), Coffea arabica (L.), Psidium guajava (L.), and Theobroma cacao (L.) between 0 and 1600 m altitudes and 22–32 ºC (Genty et al. 1978; Zener de Polania & Posada 1992; Martínez and Plata-Rueda 2013).

Environmental conditions play a vital role in the adaptation of the insect pests and cause variations in the rate of development, colonization and distribution in the tropical crops (Gilbert & Raworth 1996; Nechols et al. 1999; Andreadis et al. 2013; Kim et al. 2013). Temperature has a strong effect on the reproduction and development rates of insects (Burke et al. 2005; Noriyuki et al. 2011; Da Silva et al. 2012). In investigating insect pest problems, the life history theory can be used to analyze population structure and stability, estimate the extinction likelihood, predict pest outbreaks, and examine the colonization and invasion probabilities (Jervis & Copland 1996; Vargas et al. 2000). Studies on the insect's life histories would allow for the construction of models to analyze the reproduction, longevity and population dynamics of the pests in the agroecosystems. Studies on the biology and ecology of the oil palm pest defoliators, Elymnias agondas glaucopis Staudinger (Lepidoptera: Nymphalidae), Metisa plana Walker, Pteroma pendula Joannis (Lepidoptera: Psychidae), Segestes decoratus Redtenbacher (Orthoptera: Tettigoniidae), Leucothyreus femoratus (Coleoptera: Scarabaeidae) and Demotispa neivai (Coleoptera: Chrysomelidae) have been used as a starting point for the adoption of control methods and strategies (Young 1985; Merrett 1993; Ibrahim et al. 2013; Martínez et al. 2013a, 2013b).

Population parameters are important in the measurement of the population growth capacity of a species under specified conditions. These parameters are also used as indices of population growth rates responding to the selected conditions and as bioclimatic indices in assessing the potential of a pest population growth in a new area (Southwood & Henderson 2000). The research has been directed towards determining the basic biology of the insect pests on selected host plants and selected constant temperatures to develop models of the population dynamics (Kim et al. 2001; Bonato et al. 2007; Park et al. 2010; Panassiti et al. 2013). To develop a process-based mathematical model, descriptions of processes such as adult survival rate, oviposition, longevity and stage-specific development rates and mortalities are necessary (Taylor 1982; Southwood & Henderson 2000; Medeiros et al. 2003a, 2003b).

There is little information on the ecology of S. impressella, although populations may be increasing rapidly as oil palm plantations expand to cover larger areas (Howard et al. 2001; Martínez et al. 2013c). The biology and life history of S. impressella has been partially studied, primarily on the oil palm under variable conditions; however, these studies were carried out in the 1970s under inconsistent experimental conditions and the details of the life-cycle are not conclusive (Genty 1978; Genty et al. 1978).

In this study, we describe the development rate, survival and fecundity of S. impressella on the oil palm, E. guineensis, under different temperatures, in order to contribute to the comprehension of the demography of S. impressella as a basis for the development of Integrated Pest Management (IPM) programs in oil palm plantations.

Materials and Methods


In the field, 1835 adults of S. impressella (♂= 941, ♀ = 894) were hand captured in a 7-yr-old commercial plantations of the oil palm, in the municipality of Puerto Wilches, Santander, Colombia (N 07° 20′ -W 73° 54′), with 28.46 °C average temperature, 75–92% RH, 145–225 sunshine h/yr and 2,168 mm annual rainfall. The insects were placed in metallic boxes (70 cm long × 70 cm wide × 80 cm high) covered with a nylon mesh and transported to the Entomology Laboratory at the Universidad de La Paz, Barrancabermeja, Santander, Colombia. Stenoma impressella was reared at 28 ± 1 °C and 75 ± 5% RH under a 12:12 h L:D photoperiod. These insects were used to establish a colony under laboratory conditions. Healthy insects without malformations were used in the bioassays.


Males and females of S. impressella were caged in glass containers (30 × 30 × 30 cm) covered with a nylon mesh along with E. guineensis leaflets. Eggs were collected daily from the leaflet surfaces and transferred to Petri dishes (90 mm × 15 mm high) with a moistened filter paper at the bottom. The eggs were maintained at 16, 20, 24, 28, 32, 36 or 40 ± 1 °C, 75 ± 5% RH and 12: 12 h L:D.

In the course of the larval and pupal development, the first instar larvae were individualized in glass vials (5 cm × 25 cm high) plugged with cotton and fed daily on 25 cm2 E. guineensis leaflets. The larvae and pupae were maintained at the same temperatures as eggs until adult emergence.

The adults were placed in glass containers (30 × 30 × 30 cm) covered with a nylon mesh and fed daily on a liquid diet (10 mL of sugarcane juice + honey + water, 3:1:1 proportion). The adults were maintained at test temperatures. The life history was determined from the newly laid eggs at seven different constant temperatures. Longevity and survival data from the different developmental stages of S. impressella were recorded daily.


pair of newly-emerged adults of S. impressella were isolated and kept in glass containers (30 × 30 × 30 cm) containing E. guineensis leaflets as the oviposition site and fed daily on a liquid diet. The leaflets were replaced daily and the eggs on each leaf were collected every 24 h and counted, and egg viability was evaluated for each female. Then pre-oviposition, oviposition and post-oviposition periods were then calculated. Twenty pairs of S. impressella adults were evaluated daily until the females died.


Developmental time, survival and fecundity (pre-oviposition, oviposition and post-oviposition) were subjected to the one-way analysis of variance (ANOVA). The survival variable was summarized in percentage and the data were transformed by ?arcsine. The means associated with temperature for each variable were separated using an LSD test at the 5% significance level, when significant F values were obtained. Based on the age-specific mortality for each temperature, the survival curves for females were calculated for the Kaplan-Meier method and compared using the log-rank test. The data were analyzed with the SAS User v. 9.0 for Windows (SAS Institute 2002).

Table 1.

Developmental times of Stenoma Impressella stages at constant temperatures under laboratory conditions (75 ± 5% RH and 12:12 h L:D)


Life table parameters of S. impressella were calculated based on the life history data using the Jackknife technique (Meyer et al. 1986; Hulting 1990; Maia et al. 2000). The net reproductive rate (R0), the intrinsic rate of natural increase (rm), the finite increase rate (ë), the mean generation time (T) and the doubling time (D) were computed using the SAS User v. 9.0 for Windows (SAS Institute 2002).


Development and Survivorship of Immature Instars

Stenoma impressella completed development at all the temperatures, except at the 16 °C and 40 °C - temperatures, with no oviposition or egg hatching.

Life history parameters of S. impressella showed that different temperatures had significant effects on the development time (F1,97 = 42.1, P < 0.0001) (Table 1). The developmental time of the egg was 5.12 to 2.18 d (F1,97 = 22.3; P < 0.0001), the larval stage was 51.9 to 22.1 days (F1,97 = 63.4; P < 0.0001), the pupa was 25.6 to 10.9 d (F1,97 = 40.1; P < 0.0001), and the adult was 26.9 to 11.4 days (F1,97 = 7.91; P < 0.0001) at temperatures from 20 to 36 °C. At this temperature range, the developmental time decreased as temperature increased, whereas at the higher temperatures the developmental time was faster.

The survival rate of S. impressella was affected by temperature (F1,97 = 44.6; P < 0.0001) (Table 2). The survival from the egg to adult ranged between 65.9% at 20 °C up to 69.8% at 28 °C. From 20 °C to 32 °C, the survival increased with low temperature and declined when the temperature increased to 36 °C with 63.7%. The survival rate was higher at 24, 28 and 30 °C.

Table 2.

Survivorship (% ± SE) of Stenoma Impressella stages at constant temperatures under laboratory conditions (75 ± 5% RH and 12:12 h L:D).


Adult Longevity and Reproduction

Temperature also had an effect on the reproduction and longevity of S. impressella (Table 3). The reproductive period of S. impressella varied at temperatures from 20 and 36 °C, with pre-oviposition from 6.26 to 1.63 d (F1,17 = 5.29; P < 0.0005), oviposition from 17.6 to 10.2 d (F1,17 = 8.08; P < 0.0001), and post-oviposition period from 4.33 to 0.55 d (F1,17 = 2.17; P < 0.0001).

The female longevity was longer than that of the males (F1,17 = 20.4; P < 0.0001) (F1,17 = 16.6; P < 0.0001). Age-specific survival showed that S. impressella females were susceptible at temperatures from 20 to 36 °C (χ2 = 4.165; P = 0.091; Fig. 1). Female longevity varied from 28.2 to 12.4 days, whereas male longevity lasted from 22.9 to 9.75 days. The longevity of the females and males increased at 20 °C and declined gradually when the higher temperatures were reached.

Table 3.

Oviposition period and longevity adults of Stenoma impressella at constant temperatures under laboratory conditions (75 ± 5% RH and 12:12 h L:D)


The viable eggs throughout the lifespan of S. impressella at different temperatures were different, with peaks between days 9 and 10 at 20 °C; an earlier peak (days 8, 9 and 10) at 24 °C, a peak on day 7 at 28 °C, a peak between days 5 and 6 at 32 °C and a peak on day 7 at 36 °C. The oviposition rate declined gradually at all the temperatures (Fig. 2).

Population Growth Parameters

The population growth parameters of S. impressella such as R0, rm, λ, T and D were affected by temperature (Table 4). The net reproductive rate (R0) was altered at all temperatures according to the following pattern: 28 > 24 > 33 > 36 > 20 °C (F1,97 = 7.08; P = 0.0001). The intrinsic rate of increase (rm) also differed according to the pattern 32 > 28 > 24 > 36 > 20 °C (F1,97 = 16.23; P = 0.0001). The finite increase rate (λ) differed according to the pattern 32 > 28 > 24 > 36 > 20 °C (F1,97 = 9.23; P = 0.0001). The mean generation time (T) decreased with temperature increase between 32 and 36 °C (F1,97 = 22.46; P = 0.0001). Doubling time (D) was significantly changed with temperature (F = 91.2; P = 0.000), with a shorter doubling time at 36 °C. The results of R0, rm, λ, T and DT showed that the population density of S. impressella showed extinction at 15 and 40 °C.

Fig. 1.

Survivorship curves for life span of Stenoma impressella reared at various constant temperatures determined using the Kaplan-Meier method and compared using the log-rank test (χ2 = 4.165; P = 0.091)



Similar to other studies on the Elachistidae biology and ecology, this work showed that different temperatures affected the development, fecundity, longevity and survival of S. impressella. Under controlled conditions, S. impressella completed their development from 20 to 36 °C, without any eggs hatching at 16°C and 40 °C, indicating that temperature gradients < 20 °C and > 36 °C are unfavorable to the development of this insect. Extreme temperatures may be detrimental to insect development (Logan et al. 1976; Briere et al. 1999; Keena 2006). In our study, development was fast at high temperatures between 20 and 36 °C with the life cycle getting shortened at more than half the time. Peak developmental times of the S. impressella stages were from 28 °C to 32 °C. Stenoma impressella is commonly found in 3 to7-year-old palms, where the size and number of leaves is smaller when compared with palms over 10 years of age and young palms where the temperature is high and may favor the development of this insect. This is because the immature stages of S. impressella have been found in the lower leaves of the canopy and hence are likely benefit from the relatively stable conditions in the palm trees (Genty et al. 1978; Mexzón-Vargas et al. 1996; Howard et al. 2001).

Fig. 2.

Age-specific fecundities of Stenoma impressella reared at various constant temperatures.


Survival was high in the egg and larval stages. The survival rate can be changed in different insects, at ideal or different temperatures (Nylin & Gotthart 1998; Bowler & Terblanche 2008). Several morphological and behavioral alterations, including cocoon secretion, lack of larvae feeding and movement, were also observed. For instance, the larvae of S. impressella did not move at 20 °C, possibly because of the changes in their metabolism or as an attempt to save energy. Some lepidopteran species such as Anticarsia gemmatalis Hübner (Noctuidae), Eriogaster lanestris L. (Lasiocampidae) and Stenoma catenifer Walsingham (Elachistidae) respond to thermal changes by modifying their behavior and inducing metabolism alterations (Ruf & Fiedler 2002; Nava et al. 2005; Da Silva et al. 2012).

The temperatures between 24 °C and 28 °C were the better settings for S. impressella oviposition with low egg viability at 20 °C, perhaps due to the lower mating activity, which might impair egg fertilization. However, the pre-oviposition, oviposition and post-oviposition periods gradually increased according to the temperature. The longevity of the females was higher with respect to the longevity of the males and declined gradually when the higher temperatures (32–36 °C) were reached. These results suggest that the adults of S. impressella experienced a response of adaptation or dependence, according to the temperature increase. Reproduction and longevity of the different species show different types of adaptation or dependence for the environmental variables (Boggs 1986; Banno 1990; Eckelbarger 1994; Da Silva et al. 2012; Appiah et al. 2013). A short developmental time could be beneficial in the nonseasonal environments, because it reduces the risk of death before reproduction (Nylin & Gotthart 1998; Bowler & Terblanche 2008; Andreadis et al. 2013). In this case, the temperature effects on S. impressella can impact this invasive pest of E. guineensis, even for a short time between generations. In natural conditions, Genty et al. (1970) observed that the life-cycle duration of S. impressella was lower in seasonally dry period and higher by in rainy season period between 24–36 °C temperatures range, but not provide details of high/low populations of this insect. Our studies suggest that the reduction of development time S. impressella for thermal changes can increase the generation number, the emergence peaks in a given year, and the duration of individual developmental stage.

Table 4.

Population growth parameters of Stenoma impressella at constant temperatures under laboratory conditions (75 ± 5% RH and 12:12 h L:D)


The life table parameters for S. impressella varied at all the temperatures evaluated. The net reproductive rate of S. impressella rose higher to 28 °C > 24 °C than 36 °C > 20 °C, although the intrinsic and finite rates of population increase rose higher to 32 °C > 28 °C, due to the low immature survival on the former, suggesting that temperatures between 20 °C and 36 °C favor the S. impressella population growth and immature survival is probably the most sensitive indicator. Temperature increase results in higher growth rates and shorter developmental times of S. impressella. The population dynamics of the oil palm pest under different temperatures have been studied in some species such as Elymnias agondas glaucopis Staudinger (Nymphalidae: Satyrinae), Metisa plana Walker and Pteroma pendula Joannis (Lepidoptera: Psychidae) to develop models that can be incorporated into the phenology of the commercial plantations (Merrett 1993; Basri & Kevan 1995; Ibrahim et al. 2013).

Our findings show that temperature affects the S. impressella populations, either by reducing or increasing their occurrence in the oil palm crops.


We thank Arnulfo Guarín for his contributions in this research. To Universidad de La Paz (Colombia), Oleagionas Las Brisas (Colombia), Conselho Nacional de Desenvolvimento Científico e Tecnológico CNPq (Brasil), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior CAPES (Brasil), and Fundação de Amparo a Pesquisa do Estado de Minas Gerais FAPEMIG (Brasil).

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Luis C. Martínez, Angelica Plata-Rueda, José C. Zanuncio, Genésio T. Ribeiro, and José Eduardo Serrao "Effects of Temperature on the Development of Stenoma impressella (Lepidoptera: Elachistidae) on Oil Palm in Colombia," Florida Entomologist 97(4), 1805-1811, (1 December 2014).
Published: 1 December 2014
demographic parameters
insect pest
insecto plaga
parámetros demográficos
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