Natural control of Helicoverpa zea (Boddie) in Trans-Pecos cotton /
(51.8%). No 6th instars were round in either year and
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (51.8%). No 6th instars were round in either year and (Boddie) life stages were monitored in insedicide- (White) and unexplained mortality. Unexplained 100% of the life stages sampled consisted of H. zea. artery Xercet), Orius tristicolor attempt to extrapolate this survivorship data on a both 1996 and 1997. The egg stage experienced the During the summers of 1996 and 1997 Helicoverpa zea aphics. ecological life tables were construed for H free cotton, Gossypium hirsutum L., in the Trans-pecos greatest amount of age-specific (qx) mortality in both H. zea eggs. No pattern was evident between the number immunosorbent assay (ELISA) of field-collected 0. insecticidal intervention. Future studies should instars exhibited the highest age-specific mortality intervention on an area-wide basis. kept below economic thresholds without insecticidal larger scale to test whether bookworm populations are Life stages monitored in 1996 and 1997 conformed to a may be plausible in Trans-Pecos cotton without mortality (67.5% in 1996 and 65.4% in 1997). Third mortality represented the largest portion of egg of bookworm eggs consumed by 0. tristicolor in of the larval stages sampled in 1996 (67.2%) and 1997 our study suggests that natural control of bookworm physiogeographic region of Texas. relation to the seasonal abundance of H. zea eggs. revealed that adult and nymphal 0. tristicolor fed on The consistency of the H. zea survivorship data from Total mortality (egg to 5th instar) approached 97% in tristicolor Type III survivorship curve. Enzyme linked was attributed to Trichogramma spp., Encarsia sp. ltr. years (82.5% in 1996 and 86.0% in 1997). Egg mortality zea in each of the two vowing seasons. Partial |
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| Item Description: | "Major subject: Entomology". Vita. |
| Physical Description: | ix, 67 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references: pages 55-62. |