Environmental Entomology (1980) 9, 293-297
Antônio R. Panizzi, Maria H.M. Galileo, Hilda A.O. Gastal, Jose F.F. Toledo and C.H. Wild (1980)
Dispersal of Nezara viridula and Piezodorus guildinii nymphs in soybeans
Environmental Entomology 9 (3), 293-297
Abstract: Dispersal of Nezara viridula (L.) and Piezodorus guildinii (Westwood) nymphs, the 2 most abundant stink bugs in soybeans in Brazil, was studied. Results showed that they moved more along than across rows. Maximum distance recorded for both species along rows was 12 m, while across rows was 7.2 m for N. viridula and 4.8 m for P. guildinii.
The total number of nymphs recaptured was higher for P. guildinii than N. viridula, and the recovery rate decreased with increase in distance from the release point. Nymphs in the 2nd and 3rd stages showed strong gregarism and dispersal was more pronounced for 4th and 5th stages, which were the principal ages involved in colonization of the field. Dispersal patterns of the nymphs best fitted the equation Y = a + b Log x + c/x, where Y = density, x = distance from the release point, a = intercept, b = slope, and c = a proportionality constant.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Antônio R. Panizzi
Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
environment - cropping system/rotation
Pest and/or beneficial records:
Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
---|---|---|---|---|
Nezara viridula | Soybean (Glycine max) | Brazil (south) | ||
Piezodorus guildinii | Soybean (Glycine max) | Brazil (south) |