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Dispersal of Podisus nigrispinus (Het., Pentatomidae) nymphs preying on tomato leafminer: effect of predator release time, density and satiation level by J. B. Torres; W. S. Evangelista Jr ; R. Barras; R. N. C. Guedes is a Agricultural and Biological Sciences article available to read on EtoBox.

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**Abstract:** The dispersal potential of nymphal stinkbug, __Podisus nigrispinus__ (Dallas, 1851) (Het., Pentatomidae) preying on larvae of the tomato leafminer __Tuta absoluta__ (Meyrick, 1917) (Lep., Gelechiidae) was studied in an open‐sided greenhouse. The parameters investigated were (1) the density of nymphs released per plant (one or five); (2) the release time (0600 and 1800 h); and (3) predator satiation level (satiated and 24‐h‐starved nymphs). Tomato plants were infested with larvae of the tomato leafminer (one third or fourth instar per leaf). The evaluations started 30 min after the release of predators second instar and hourly evaluations were carried out over 36 and 24 h for release times of 0600 and 1800 h, respectively. Starved nymphs released in the morning, either alone or in groups of five, dispersed faster than satiated nymphs. All of the starved individuals had left the plant by the end of the observation period, whereas 25 and 36% of the satiated nymphs released alone and in groups, respectively, stayed on the plant until the end of the observation period. Both satiated and starved nymphs showed slower rates of dispersal when released at 1800 h. Satiated nymph

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Author

J. B. Torres; W. S. Evangelista Jr ; R. Barras; R. N. C. Guedes

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Verlag Paul Parey; Wiley (ISSN 0931-2048)

Published

2002

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)