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Advisor(s)
Abstract(s)
From late summer onwards, the third instar larvae of the olive fly, Bactrocera
oleae (Rossi) (Diptera: Tephritidae), leave the fruit and fall in the soil to pupate. The
behavior of the larvae in the soil (the time it takes to bury and the pupation depth)
affects their exposition to predators and, consequently, their survival. On the other
hand, this period coincides with the rain season, interfering with pupation behavior
and pupae survival. In this context, tests were conducted to investigate (a) the time
that larvae spent until finding a place to pupate, (b) the burial depth, and (c) the
emergence of adults in response to different soil moisture contents. In laboratory
conditions,two trials were conducted at 12ºC to simulate the season’s temperature.
The first was to evaluate the time that each larva took to pupate and pupation
depth, measured one week after pupation by inspecting the pupation depth of
each pupa. And the second was to assess adult emergence in closed containers (to
prevent humidity losses) until adult emergence. For each of the five bag/container
five larvae were placed at the surface of the soil and were allowed to pupate.
Results indicated that larvae’ time spent finding a place to pupate ranged between
2.63±0.27 and 47.67±8,23 minutes in 50% and 100% moisture content, respectively.
The pupation depth took place between 0.25±0.06 and 1.34±0.17 mm in 25% and
75% moisture content, respectively. The time spent and the pupation depth was
significantly different according to soil moisture being higher when the soil was
wet (75 and 100% moisture). Even though the adult emergence did not differ.
Description
Keywords
Pupation depht Survivor Olive fly
Citation
Neto, Marco Aurélio; Rodrigues, Isabel; Gonçalves, Maria de Fátima; Pereira, J.A (2022). Pupation behavior and emergence success of Bactrocera oleae (Rossi) (Diptera: Tephritidae) in different soil moisture contents. In XII Congresso Nacional de Entomologia Aplicada. Malaga
Publisher
Sociedade Espanhola de Entomologia Aplicada