ABSTRACT
Given the importance to study the natural enemies in the environment and the efficiency in the control of the insects, the present study had the objective to identify the presence of the Cycloneda sanguinea L. as a regulator organism, in the field associated with the plant Solanum tuberosum. The methodology used for evaluation was the presence-absence (binomial sample) of insects on two varieties, Achat and Monalisa during the period of May 6 up to August 2, 1996, associated with bioecological and trophics interactions. The results showed 48 individuals on 169 plants monitored in the area of research. A larger number of C. sanguinea was found in green and senescent leaves. The dynamics of C. sanguinea was evident in the first week of May, when 14,58% was registered associated probably with the maximum temperature of 25° C and minimum of 13ºC. The graphic analysis pointed two times of decrease on the insect population, at 30 and 60 days after the fertilization with N and K. The result showed significant differences among them, mainly in function of fertilization, with the cv Achat (0,0865< p < 0,10), while to the cv Monalisa the influence was associated with the temperature, whose occurrence had probability of 0,0862 < p < 0,10. After evaluation of the population dynamic of C. Sanguinea, we can concluded that the adult insect is well adjusted to the conditions of high temperatures and low precipitation.
Key words
Natural enemies; Cycloneda sanguinea; Biotic regulator organism; potato; fenologic stadium.