Effect of short-term high-temperatures on the growth, development and reproduction in the fruit fly, Bactrocera tau (Diptera: Tephritidae).

ABSTRACT: Bactrocera tau (Walker) (Diptera: Tephritidae) is an economically important invasive pest, that is capable of seriously reducing the quality and yield of vegetables and fruits, it was first recorded from Fujian province in 1849 and later introduced to Yunnan province in 1912 as a result in trade fruits and vegetables of China. In recent years, with the onset of global climate change and the accompanying increase in the greenhouse effect, elevated climatic temperatures have become one of the main environmental factors affecting growth and reproduction in insects, and the optimal developmental temperature of B. tau was found to be from 25?°C to 31?°C, the growth, development and reproduction of B. tau are normal under the optimal temperature conditions. In order to determine the repercussions that elevated temperature have on B. tau, we assessed the effects that short-term (12?h) high-temperature exposures (34?°C, 36?°C, 38?°C, 40?°C, 42?°C, 44?°C, 46?°C, and 48?°C) had on the growth, development and reproduction of B. tau at different developmental stages of the fly. The results showed that the survival rate of B. tau gradually decreased in all stages following exposure to short-term high-temperatures. The pupal stage was the least sensitive to increased temperatures. The pupae withstood the highest lethal temperature, having an LT50 of 42.060?°C, followed by female adults (40.447?°C), male adults (40.013?°C), and larvae (36.740?°C). The egg stage, which was the most susceptible to heat increases, had the lowest LT50 (38.310?°C). No significant effects were observed in the developmental stages of B. tau at temperatures from 24?°C to 38?°C. The development duration was significantly prolonged at 40?°C (P?

SUBMITTER: Huang Y 

PROVIDER: S-EPMC7156735 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature