Effects of thermal shock on the survival and reproduction of Stratiolaelaps scimitus (Mesostigmata: Laelapidae)
- PDF / 829,311 Bytes
- 9 Pages / 439.37 x 666.142 pts Page_size
- 3 Downloads / 195 Views
Effects of thermal shock on the survival and reproduction of Stratiolaelaps scimitus (Mesostigmata: Laelapidae) Priscilla C. Gobbi1 · Juliano L. P. Duarte1 · Lucas R. da Silva1 · Dori E. Nava2 · Gustavo Sessa Fialho3 · Uemerson S. da Cunha1 · Adriane da F. Duarte1 Received: 21 May 2020 / Accepted: 6 November 2020 © Springer Nature Switzerland AG 2020
Abstract The responses of arthropods to thermal stress are vital in ecological studies in order to understand survival, development, and reproduction. However, this subject is poorly addressed. In the order Mesostigmata, an abundance of species lives in the soil. Among these species, Stratiolaelaps scimitus (Womersley) is a predator used in the control of pest organisms that live in the soil. Mites of this species are commercialized in several coun‑ tries, including Brazil, presenting efficiency in pest control in several crops. The objec‑ tive of this study was to evaluate the effect of thermal shock on S. scimitus females, as well as to monitor the temperature variation in the environment. For each temperature, 80 experimental units were assembled for different periods (0.5, 1, 2, and 4 h). Experimen‑ tal units were maintained at 25 °C, after exposure of the mites. Mortality and oviposition were evaluated. The results showed a 40% reduction in the survival of mites exposed to 37 °C for 4 h, compared to the control treatment (25 °C). Oviposition was less affected at 1 h exposure to temperatures of 19 and 12 °C and thermic fluctuation was observed in the greenhouse, especially inside the slabs. Understanding temperature effects in mites and the thermic fluctuation in the environment is essential to achieve satisfactory results in biological control. It is important to observe the scenario in which predatory mites will be released as these aspects are decisive in predatory activity. Keywords Biological control · Predatory mites · Temperature · Thermal fluctuations
* Priscilla C. Gobbi [email protected] 1
Departamento de Fitossanidade, Faculdade de Agronomia Eliseu Maciel (FAEM), Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul 96001‑970, Brazil
2
Laboratório de Entomologia da Empresa Brasileira de Pesquisa Agropecuária (Embrapa Clima Temperado), Pelotas, RS, Brazil
3
Departamento de Matemática e Estatística, Matemática, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul 96001‑970, Brazil
13
Vol.:(0123456789)
Experimental and Applied Acarology
Introduction Known to be a potential predator, the mite Stratiolaelaps scimitus (Womersley) is widely used for the control of Bradysia matogrossensis (Lane) (Diptera: Sciaridae) lar‑ vae in mushroom farms, nurseries, and greenhouses (Brasil 2018). Mesostigmata mites have huge species diversity and are very abundant in the soil (Lindquist et al. 2009). In this environment, their populations are affected by biotic and abiotic factors. Among the abiotic ones, temperature, humidity, and soil moisture are probably the most important factors (Adis 1988; Ghazy et al. 2016).
Data Loading...
