http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Evaluation of natural enemies of greenbug, Schizaphis graminum (Rondani), on sorghum using two approaches of the insecticidal check method
(14.88 oz/ha) applications at three day intervals were
0.05). The relative usefulness of the two approaches is
additives produced resulted in an increased attractiveness to
Al/ha produced no significant differences (at P = 0.05) in
applied at 0.03 kg Al/ha and chlorpyrifos applied at 0.005 kg
attracted to malathion-treated sorghum leaf infested with
attraction to malathion, and to their inability to move after
differences in the greenbug or natural enemy populations. In
discussed in evaluating the natural enemies of greenbug.
earlier work on effects of insecticides on beneficial
effective to exclude predators. These natural enemy
Enemy removal experiments and enemy trap experiments were
enemy trap experiments, Karate (0.02 kg Al/ha) and Bidrin
exclusion agents permitted significantly higher populations
exclusion in the treated plots may be primarily due to
graminum (Rondani). In enemy removal experiments, malathion
greenbug. This suggests that the insecticide or associated
insects. Aphelinus asychiv (Walker) in an olfactometer was
malathion displayed sluggish or no movement when presented
of greenbugs and lower populations of predators in the
olfactometer. These results suggest that failure of parasite
parasites accumulating in the treated plots due to their
Results from experiments on the effects of malathion on host
selection behavior present some interesting contrasts to
the natural enemy or greenbug populations when compared with
the pest-insect-plant complex. The parasites preexposed to
the untreated (control) plots. In a similar comparison,
three application frequencies of these insecticides, i.e.,
three, seven and fifteen day intervals, produced no
treated plots when compared with the untreated plots (P =
used for evaluating the natural enemies of greenbug, S.
with greenbug-infested and uninfested sorghum leaves in an
Issued also on microfiche from Lange Micrographics.
Includes bibliographical references: pages 75-87.