| Autor: |
Brown, P., Silvertooth, J., Moore, L., Watson, T. |
| Rok vydání: |
1992 |
| Předmět: |
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| Druh dokumentu: |
Článek |
| Popis: |
A heat-unit-based planting window was introduced in 1991 as a means of reducing early season problems with pink bollworm (PBW). Growers were encouraged to plant full season varieties when the annual heat unit (HU) accumulation ranged between 600 and 900 -- a window designed to ensure 75% suicidal emergence of PBW yet maintain acceptable yield levels. New research findings and a reexamination of past PBW emergence studies now support making an adjustment to the planting window. For 199Z the recommended planting window is 450 - 700 HUs after January 1. |
| Databáze: |
Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
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