Abstract
Consumer concerns about pesticide residues and environmental degradation are having a significant impact on the California grape industry. Growers are using a variety of practices, from integrated pest management to certified organic production, to reduce the amount of pesticides and other synthetic inputs used in vineyards. This experiment was established to test selected sustainable cultural practices in a mature `Thompson Seedless' vineyard. Treatments included in the experiment were row middle management (cultivated vs. perennial legume cover crop) and nitrogen fertilization (compost vs. synthetic). Vine nutritional status, yield, fruit composition, pruning weight, and population levels of the variegated leafhopper were monitored each season (1992–1994). In addition, efforts were expanded during the 1994 season to include assessment of spider, herbivorous mite, and beneficial arthropod densities. Conventional cultural practices (cultivation and synthetic fertilizer) produced the highest yields during the 1992 and 1993 seasons. This result may have been due to the nutritional status of vines, which was generally better for the cultivation and synthetic fertilizer treatment, especially in 1992. In 1994, significant treatment effects on yield were not observed, indicating that legume cover crop plots had become fully established. Sustainable cultural practices had little impact on growth, fruit composition, or insect pest pressure. `Thompson Seedless' grapes were grown for three seasons without the use of insecticides or herbicides. Vine diseases were managed by cultural practices and application of sulfur.
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Claims 6
Claim · model-written summary
Cultivation with synthetic fertilizer gave the highest yields in 1992 and 1993.
- Taxon
- grapese1
- Material
- `Thompson Seedless'e1
- Treatment
- cultivation and synthetic fertilizere0
- Outcome
- yieldse0
- Direction
- higheste0
- Qualifier
- 1992 and 1993 seasonse0
Not reportedComparator
Verbatim
e0“Conventional cultural practices (cultivation and synthetic fertilizer) produced the highest yields during the 1992 and 1993 seasons.”
e1“`Thompson Seedless' grapes”
Claim · model-written summary
Vine nutritional status was generally better under cultivation and synthetic fertilizer, particularly in 1992.
- Material
- `Thompson Seedless'e1
- Treatment
- cultivation and synthetic fertilizer treatmente0
- Outcome
- nutritional status of vinese0
- Direction
- bettere0
- Qualifier
- especially in 1992e0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nutritional status of vines, which was generally better for the cultivation and synthetic fertilizer treatment, especially in 1992”
e1“`Thompson Seedless' Grapevines”
Claim · model-written summary
Yield treatment effects were not significant in 1994.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1994, significant treatment effects on yield were not observed”
e1“`Thompson Seedless' Grapevines”
Claim · model-written summary
Sustainable practices had little impact on growth, fruit composition and insect pest pressure.
- Treatment
- Sustainable cultural practicese0
- Outcome
- growth, fruit composition, or insect pest pressuree0
- Direction
- little impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sustainable cultural practices had little impact on growth, fruit composition, or insect pest pressure.”
e1“`Thompson Seedless' Grapevines”
Claim · model-written summary
Thompson Seedless grapes were grown three seasons without insecticides or herbicides.
Verbatim
e0“`Thompson Seedless' grapes were grown for three seasons without the use of insecticides or herbicides.”
Claim · model-written summary
Vine diseases were managed with cultural practices and sulfur.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vine diseases were managed by cultural practices and application of sulfur.”
e1“`Thompson Seedless' Grapevines”
The same questions in other papers
fertilization · yield · VitisResults differ
96 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
103 papers more in this group
See all 107 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.