Age-stage, two-sex life table of Parapoynx crisonalis (Lepidoptera: Pyralidae) at different temperatures

Abstract

Parapoynx crisonalis is an important pest of many aquatic vegetables including water chestnuts. Understanding the relationship between temperature variations and the population growth rates of P. crisonalis is essential to predicting its population dynamics in water chestnuts ponds. These relationships were examined in this study based on the age-stage, two-sex life table of P. crisonalis developed in the laboratory at 21, 24, 27, 30, 33 and 36°C. The results showed that the values of Sxj (age-stage–specific survival rate), fxj (age-stage-specific fecundity), lx (age specific survival rate) and mx (age-specific fecundity) increased as the temperature rose from 21 to 27°C, then decreased from 30 to 36°C. Temperature also had a significant effect on the net reproductive rate (R0), gross reproductive rate (GRR), intrinsic rate of increase (r) and finite rate of increase (λ). The value of these parameters were at low levels at 21, 33, and 36°C. Further, the r value decreased as the temperature rose from 24 to 30°C, while the GRR reached its highest level at 27°C. The results indicated that optimal growth and development of P. crisonalis occurred at temperatures between 24°C to 30°C when compared to the lowest temperature (21°C) and higher temperatures of 33°C and 36°C.

Effects of three different cultivars of cruciferous plants on the age‐stage, two‐sex life table traits of Plutella xylostella (L.) (Lepidoptera: Plutellidae)

“…In the present study, R 0 was highest on cauliflower (Table 2), as were s xj , f xj , l x , and m x . According to life table traits, if R 0 < 1 and r > 0 the mean population will increase rapidly on that host (Southwood & Henderson 2000;Chen et al 2017); the results of the present study support this theory (Table 2). There are numerous factors that can affect host suitability, including the nutritional content of the host.…”

“…According to life table traits, if R 0 < 1 and r > 0 the mean population will increase rapidly on that host (Southwood & Henderson ; Chen et al . ); the results of the present study support this theory (Table ).…”

“…To keep the leaves turgid, wet cotton wool was wrapped around the petiole of the leaves. The leaves were changed daily and the number of eggs laid on the leaves was counted (Saeed et al 2010;Colinet et al 2015;Chen et al 2017).…”

Age-Stage, Two-Sex Life Table of the Menochilus sexmaculatus (Coccinellidae: Coleoptera) Feeding on Different Aphid Species

“…Development duration and population parameters were calculated using TWOSEX-MS Chart, to minimize variation in the results. The bootstrap technique (29) with 100,000 replications was used to calculate the mean and SE of the population (30). The TIMING-MS Chart program (31) based on age-stage two sex life table for data of M. sexmaculatus .…”

What is a moth doing under water? Ecology of aquatic and semi-aquatic Lepidoptera

“…The few ecological studies that have been published during the last 15 years often addressed the biology of the already relatively well-studied and common, mostly European species such as C. lemnata or A. ephemerella (e.g. van der Heide et al, 2006;Erhard et al, 2007;Miler et al, 2014;Pabis, 2014) or species treated as pests of cultivated aquatic plants, such as the common Parapoynx crisonalis (Li et al, 2017;Chen et al, 2017b). This situation might be due to the paucity of specialists, or the relative difficulty of carrying out long-term laboratory observations, and perhaps also due to the relatively minor economic importance of the insects in question, although they are sometimes used for biological control of selected macrophytes (Center and Hill, 2002;Bownes, 2010).…”