Effects of Nitrogen Fertilizer Level on Development and Populations of the Pecan Leaf Scorch Mite (Acari: Tetranychidae)1
| Autor: | Preston E. Hunter, Patrick R. Jackson |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
education.field_of_study
integumentary system Ecology media_common.quotation_subject Population Leaf scorch General Medicine Biology biology.organism_classification medicine.disease Photosynthesis respiratory tract diseases Horticulture Nitrogen fertilizer immune system diseases Insect Science parasitic diseases Botany medicine Mite Acari Reproduction Orchard education media_common |
| Zdroj: | Journal of Economic Entomology. 76:432-435 |
| ISSN: | 1938-291X 0022-0493 |
| DOI: | 10.1093/jee/76.3.432 |
| Popis: | Population development and specific effects of the pecan leaf scorch mite, Eotetranychus hicoriae (McGregor), were studied on pecan seedlings grown under N regimes of 0, 200, or 600 ppm. The largest mite population developed on seedlings with N at 200 ppm (recommended level for good orchard maintenance). The size of this population was attributed to enhanced mite reproduction and not to a shorter life cycle. Generation mortality was 65.3% at 0 ppm, 40.6% at 200 ppm, and 37.8% at 600-ppm N. Compared with that of control seedlings, net photosynthesis (Pn) was less in seedlings with mites at 200-ppm N, but was greater in seedlings with mites at 600-ppm N. Seedlings with mites and provided with 200-ppm N were shorter than seedlings without mites, but in the 600-ppm N test seedlings with mites were taller than seedlings without mites. |
| Databáze: | OpenAIRE |
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