The complete mitochondrial genome (mitogenome) of Artogeia melete was determined as being composed 15,140 bp, including 13 protein-coding genes (PCGs), 2 rRNA genes, 22 tRNA and one control region. gene order A. mitogenome is typical Lepidoptera differs from the insect ancestral type in location trnM. has a total 119 bp intergenic spacer sequences spread over 10 regions, ranging sizes between 1 48 bp. nucleotide composition also biased toward A T nucleotides (79.77%), which higher than that...

The effect of temperature on development and the photoperiod diapause incidence insects are common topics in insect physiology. Related to these topics, 3 important concepts: lower upper developmental thresholds, which represent limits thermal range for develop, critical photoperiod, causes 50% a population. To compare or thresholds 2 different stages populations at same stage is difficult because lack suitable statistical method. Shi et al. (2010) proposed methods testing whether there...

The fall webworm, Hyphantria cunea (Drury), enters facultative diapause as a pupa in response to short-day conditions during autumn. Photoperiodic curves showed that the critical day length for induction was 14 h 30 min, 25 min and 13 at 22, 28°C, respectively. photoperiodic responses under non-24 light–dark cycles demonstrated night played an essential role determination of diapause. Experiments using short interrupted by 1-h light pulse exhibited two troughs inhibition effect greater early...

Abstract. Cabbage beetles, Colaphellus bowringi , undergoing an imaginal summer and winter diapause in the soil, show a great difference duration (from several months to more than 3 years) under natural conditions. The effects of on future reproduction beetle are investigated at 25 °C with LD 14 : 10 h photoperiod fecundity postdiapause adults short 5 nondiapause is similar, showing that has no affect reproduction, whereas longevity significantly shorter adults, negative longevity. mean...

Abstract The A sian corn borer, O strinia furnacalis ( G uenée) L epidoptera: C rambidae), enters facultative diapause as fully grown larva in response to short‐day conditions during the autumn. Photoperiodic curves showed a stable critical daylength of ca. 13.5 h at 25, 28, and 30 °C, which is nearly identical with between 13 22 min 27 field. incidence obviously declined ultra‐long nights (14–22 scotophases) DD (i.e., constant darkness). required day number RDN ) for 50% differed...

Abstract In mid‐May, 2019, the fall armyworm (FAW) Spodoptera frugiperda invaded Jiangxi Province, China, and caused extensive damage to corn crops. However, little attention has been given life‐history traits of FAW. present study, we systematically investigated newly invasive FAW on leaves at 19, 22, 25, 28, 31°C under a photoperiod LD 15:9 hr. The thrived with short developmental periods, high survival rates larvae pupae, very mating success rates, fecundity. pupal stage was significantly...

The A sian corn borer Ostrinia furnacalis G uenée ( L epidoptera: C rambidae) enters facultative diapause as fully‐grown larvae in response to short day lengths during autumn. As a result of geographical variations photoperiodic response, the moths from N anchang (28.8°N, 115.9°E; NC strain) judge both LD 14 : 10 h and 15 9 photocycles long days develop directly, whereas H aerbin (44.9°N, 127.2°E; HB same enter diapause. Crosses between two strains are used evaluate inheritance critical for...

Abstract The intensity of pupal diapause in the cotton bollworm, Helicoverpa armigera (Hübner) was investigated under both laboratory and natural conditions. By transferring diapausing pupae induced LD 11:13, 12:12 13:11 at 20, 22 25 °C to combined with 15:9 terminate rearing day length 11 h evoked greater than did 12 13 °C; whereas temperature more intense 20 11:13. six temperatures 18, 22, 25, 28 31 diapause, duration significantly shortened from 146 days 18 24 °C, showing that high...

Temperature has a significant influence on the development of Laodelphax striatellus (Fallén), an important rice pest insect in east Asia. We set eight constant temperatures from 18 to 32°C 2°C-increments check effect temperature developmental rate this species. The durations eggs and nymphs were observed daily. To ensure accuracy durations, 500 initial samples taken for nymphal stage at each temperature. Performance-2 model was used fit these data because can provide lower upper thresholds...

Abstract Significant differences in life-history traits between the southern population (S) and northern (N) of cabbage beetle Colaphellus bowringi make it an excellent model for studying inheritance this insect. In present study, we observed pure strains, F 1 , reciprocal backcross 2 progeny under a photoperiod L:D 15:9 h at 22 °C. The S had shorter larval development time, longer pupal higher body weight, growth rate weight loss compared with N population. testing, time hybrid populations...

<title>Abstract</title> Studying the latitudinal cline in life-history traits is crucial for understanding how organisms adapt to seasonal environments and predicting their potential responses climate change. In this study, we systematically examined of cabbage beetle <italic>Colaphellus bowringi</italic> collected from six sites spanning a 21º range. Our results demonstrated that post-diapause female body weight fecundity decreased stepwise manner with increasing latitude, consistent...

Abstract The pine caterpillar, Dendrolimus punctatus (Walker) (Lepidoptera: Lasiocampidae), is a multivoltine pest of trees in China, overwintering as larvae. Winter diapause was induced by short day length. critical night length about 10 h 40 min at 25, 28, and 31 °C the field, showing temperature‐compensated induction. Transfer experiments from (L16:D8) to long (L12:D12) or vice versa different times after hatching showed that sensitivity restricted first 14 days; required number for 50%...

The evolutionary and phenotypic responses to environmental gradients are often assumed be the same, a phenomenon known as "cogradient variation". However, only few insect species display cogradient variation in physiological traits along latitudinal gradient. We found evidence for such response examination of life history cabbage beetle Colaphellus bowringi from 6 different geographical populations at 16, 19, 22, 24, 26 28°C. Our results showed that larval pupal development times...

Abstract Life‐history traits from four geographical populations (tropical Ledong population [ LD ], subtropical Guangzhou GZ ] and Yongxiu populations, temperate Langfang LF ]) of the Asian corn borer, Ostrinia furnacalis were investigated at a wide range temperatures (20–32°C). The larval pupal times significantly decreased with increasing rearing temperature, growth rate was positively correlated temperature. relationship between body weight temperature in O. did not follow...