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
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (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 contacting the malathion. 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 |
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| Item Description: | "Major subject: Entomology". Vita. |
| Physical Description: | xii, 96 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: pages 75-87. |