Development of Heterodera glycines Life Stages as Influenced by Temperature
The effects of temperature on rates of development of Heterodera glycines egg and juvenile stages were examined as a basis for predicting generation times of the nematode on soybean. The relationship of temperature to H. glycines embryonic development between 15 and 30 C was described by a linear mo...
| Veröffentlicht in: | Journal of nematology. - 1969. - 20(1988), 3 vom: 15. Juli, Seite 366-72 |
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| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
1988
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| Zugriff auf das übergeordnete Werk: | Journal of nematology |
| Schlagworte: | Journal Article Glycine max Heterodera glycines development rate ecology hatching rate mortality rate soybean cyst nematode threshold temperature |
| Zusammenfassung: | The effects of temperature on rates of development of Heterodera glycines egg and juvenile stages were examined as a basis for predicting generation times of the nematode on soybean. The relationship of temperature to H. glycines embryonic development between 15 and 30 C was described by a linear model, The calculated basal temperature threshold was 5 C. Thermal optimum for embryogenesis and hatch with low mortality was 24 C. Development proceeded to first-stage juvenile at 10 C and to second-stage juvenile at 15-30 C. Hatch occurred at 20-30 C. At 36 C, development proceeded to the four-cell stage, then the eggs died. The range of diurnal soil temperature fluctuation and accumulated degree-days between 5 and 30 C (DD5/30) had an impact on rate of development of juveniles in soybean roots. From early June to early July, H. glycines required 534 + 24 DD5/30 (4 weeks) to complete a life cycle in the field. During the midseason (July and August), life cycles were completed in 3 weeks and 429 +/- 24 DD5/30 were accumulated. Late in the season (September to November), declining soil temperatures were associated with generation times of 4 weeks and slower rates of development |
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| Beschreibung: | Date Completed 14.07.2011 Date Revised 20.10.2021 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 0022-300X |