U radu je prikazana uporedna efikasnost dva insekticida prirodnog
porekla, Spinosada i Abamektina, koji nisu registrovani za uskladištenu
zrnastu robu, ali su u širokoj upotrebi u organskoj proizvodnji. Efikasnost
ovih insekticida ispitivana je na žitnom kukuljičaru Rhyzopertha
dominica F., kao primarnoj štetočini koja može da infestira sve vrste
uskladištenih strnih žita. Insekticidi Laser 240 SC i Abastate EC
primenjeni su u količini 0,25, 0,5 i 1,0 g a.s. kg-1 žita (pšenica, raž,
tritikale, ječam i ovas). Utvrđena je veća inicijalna efikasnost Spinosada,
čijom primenom nije ustanovljen „efekat zrna“. Povećanjem doze primene
i dužine ekspozicije povećava se efikasnost Abamektina i smanjuje
razlika u efikasnosti između ispitivanih vrsta žita. Deset sedmica posle
tretiranja Spinosadom i Abamektinom nije utvrđena pojava potomstva R.
dominica. Iako imaju različite mehanizme delovanja, rezultati ukazuju na
moguću upotrebu i Spinosada i Abamektina u zaštiti uskladištenog strnog
žita.This paper analyzed the comparative effectiveness of two insecticides
of natural origin, Spinosad and Abamectin, which are not registered for
grain storage, but are widely used in organic production. The effectiveness
of these insecticides was tested on the lesser grain borer Rhyzopertha
dominica F. as a primary pest that can infest all types of small
grains. The insecticides Laser 240 SC and Abastate EC were applied in
the amount of 0.25, 0.5 and 1.0 g a.s. kg-1 grain (wheat, rye, triticale,
barley and oats). A greater initial efficiency of Spinosad was established,
with the application of which no "grain effect" was recorded. Increasing
the application dose and the length of exposure of R. dominica increases
the effectiveness of Abamectin, and reduces the difference in the effectiveness
to the tested types of grain. Ten weeks after exposure to Spinosad
and Abamectin the research did not determine the presence of R.
dominica offspring. Although they have different mechanisms of action,
the results indicate the possible use of Spinosad and Abamectin in the
protection of stored small grains