Planta Daninha (2009) 27, 879-886
D. Martins, R.A. Pitelli, M.S. Tomazella, R.H. Tanaka and A.C.P. Rodrigues (2009)
Levantamento da infestação de plantas aquáticas em Porto Primavera antes do enchimento final do reservatório
[Aquatic plant infestation assessment in Porto Primavera reservoir before final filling]
Planta Daninha 27 (n.spe), 879-886
Abstract: The objective of this work was to identify the aquatic plants and their infestation levels in Porto Primavera Reservoir in the state of São Paulo, Brazil, before the reservoir was filled. The aquatic vegetation in the dam (72 sites) were evaluated and marked with GPS equipment. The species were identified and a visual estimate (site size) of the proportional distribution of the plants in the infestation foci was carried out. After plant identification, eighteen macrophyte species were found in the dam and their frequency and distribution were determined as follows: Eichhornia crassipes, Eichhornia azurea, Pistia stratiotes, Paspalum repens, Cyperus brevifolius, Paspalum conspersum, Echinochloa polystachya, Egeria densa, Egeria najas, Polygonum hidropiperoides, Polygonum lapathifolium, Alternanthera philoxeroides, Eleocharis sellowiana, Nymphaea ampla, Pontederia cordata, Salvinia auriculata, Salvinia rotundifolia, Typha angustifolia. The highest relative frequencies were observed in: E. azurea (36.11%), E. crassipes (16.67%), P. stratiotes (13.89%), S. auriculata (13.89%), C. brevifolius (11.11%), and P. lapathifolium (6.94%).
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(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
