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Food extraction by the males of Podisus nigrispinus Dallas Hemiptera: Pentatomidae from cotton leafworm larvae. In this work, the effect of different densities 1, 3, 5, 7 and 9 of 3rd instar Alabama argillacea Huebner larvae on food consumption by Podisus nigrispinus Dallas males was evaluated. The densities established were converted to weight of prey offered: The quantity of food consumed by P.
The density of preys did not affect the time spent by the predator to ingest the food. The quantity of food extracted per minute was always higher in smaller densities and lower in higher densities. Males mean body weight did not differ statistically between the treatments tested, and weight gain was smaller in the first two densities tested.
Relative consumption rates increased with the quantity of larvae offered. Key words: Cotton leafworm, predator, stinkbug, food consumption, nutrition. As densidades utilizadas foram convertidas a peso de presa oferecida: 13,40 mg 1 lagarta , A quantidade de alimento consumido pelo macho de P. As taxas de consumo relativo aumentaram com a quantidade de lagartas oferecidas. Os machos de P. One of the promising alternatives to reduce the use of chemicals in the agricultural ecosystems is the integration between the natural enemies predators and parasitoids and selective pesticides Pereira et al.
Predaceous stinkbugs Hemiptera: Pentatomidae, Asopinae are still neglected in agricultural practices, because the only species of this group in commercial use for biological pest control in North America and Europe is Podisus maculiventris Say De Clercq, However, these predators have a promising future in the control of agricultural and forest pests of economical importance.
Among these species are P. Podisus nigrispinus is one of the most common species of Asopinae studied in the Neotropical region De Clercq, , and has been reported in several countries of South and Central America Thomas, ; Medeiros et al. Although P. Food consumption and its utilization are basic needs for the growth, development, and reproduction of all organisms.