Gastroidea viridula Deg. potential to control mossy sorrel (Rumex confertus Willd.)
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University of Technology and Agriculture, Kordeckiego 20, 85-225 Bydgoszcz, Poland Department of Applied Entomology
University of Technology and Agriculture, Kordeckiego 20, 85-225 Bydgoszcz, Poland Department of Plant Growth Principles and Experimental Methods
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Dariusz Piesik
University of Technology and Agriculture, Kordeckiego 20, 85-225 Bydgoszcz, Poland Department of Applied Entomology
Journal of Plant Protection Research 2005;45(2):63-71
Terrain and laboratory research were conducted to determine the potential of Gastroidea viridula Deg. (Coleoptera: Chrysomelidae) to control mossy sorrel (Rumex confertus Willd.). In a field study, the dynamicof plant biomass and number of larvae occurring on that plant were investigated. The Pearson’s linear correlation coefficient of biomass increase in time equalled, to r = 0.96. The regression equation showed, that the plant daily growth reached 29 g; and 210 g per week, consequently. In the laboratory, weight of consumed food by larvae, and larval body weight were measured at 20°C. First generation of G. viridula was taken into consideration. Total weight of consumed leaves by all three instars of a single larva, during 50 days of the development amounted to 1.243 g. Also seasonal abundance of larvae was observed. On May 25th the highest observed number of G. viridula larvae per plant ranged from 435 to 469 individuals. This species may be of usefulness in biological control of mossy sorrel.
The authors have declared that no conflict of interests exist.
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