Plant Pathology
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Root-knot nematodes are highly adaptable, obligate plant parasites (parasites that cannot reach adulthood without a host) that attack plant roots and establish a prolonged relationship with their hosts. There are three common species of root-knot nematodes known to parasitize watermelon in the U.S.: the southern root-knot, M. incognita, the peanut root-knot, M. arenaria, and the Javanese root-knot, M. javanica. The southern root-knot nematode is ranked first in terms of negative impact on watermelon production, particularly in warm temperate climates. Many watermelon fields in Georgia are infested with one or more species of root-knot nematodes.
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This regional integrated pest management guide provides recommendations for strawberry production in the Southeastern U.S. Recommendations are based on information from the manufacturer’s label and performance data from research and Extension field tests. This publication is intended for use only as a guide. Specific rates and application methods are on the pesticide label, and these are subject to change
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This report provides research and extension results for trials conducted by the University of Georgia Vegetable Team and its collaborators in 2019. Contributing authors include county and regional faculty as well as specialists from UGA’s horticulture, plant pathology, crop and soil sciences, and entomology departments.
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2017 plant disease losses, including control costs, amounted to an estimated $936 million. The value of the crops used in this estimate was approximately $6,634 million, resulting in a 14.1% relative disease loss across all crops included in this summary. The estimated values for most crops used to compute these disease losses are summarized in the 2017 Georgia Farm Gate Value Report (AR-18-01) published by the UGA Center for Agribusiness and Economic Development. Some estimates for fruits, ornamentals, and turf rely on specialists’ knowledge of the industry and industry sources for information.
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In 2016, Georgia’s plant disease losses, including control costs, amounted to an estimated $821 million. The value of the crops used in this estimate was approximately $6,596 million, resulting in a 12.8% relative disease loss across all crops included in this summary. The estimated values for most crops used to compute these disease losses are summarized in the UGA Center for Agribusiness and Economic Development’s 2016 Georgia Farm Gate Value Report (AR-17-01). Some estimates for fruits, ornamentals, and turf rely on specialists’ knowledge of the industry and industry sources for information.
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Operating a chainsaw is inherently dangerous. Chainsaw cuts are always serious, but this is not the only hazard a saw operator faces. Saw operators are often struck by falling limbs and trunks as the tree moves during felling. Saw operators may fall off ladders or out of trees, or they may trip while moving through brush and uneven ground. Even when the tree is on the ground, danger lurks in wood under tension. Spring poles snap and logs roll unexpectedly. Personal protective equipment (PPE) saves lives every day. The Occupational Safety and Health Administration (OSHA) requires that saw operators wear the PPE described in this publication, including head protection, eye protection, ear protection, chainsaw chaps or pants, and suitable footwear.
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Soil fumigants alone or in combination with nonfumigant nematicides can provide vegetable growers effective and reliable control of plant-parasitic nematodes, profitable yield and product quality, and increased profits. Treating soil with fumigant nematicides has been very beneficial to vegetable growers in Georgia, but environmental concerns may restrict the broad usage of these products. Telone II has been an important nematode management tool for the field production of many vegetable crops. Vegetable growers will have very limited options if soil fumigants, in particular Telone II, are no longer available. The development of new effective and environmentally safe nonfumigant nematicides has reduced the dependency on fumigant nematicides, but the application of fumigants still has great value for growers in Georgia.
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B 1499
Haiti Peanut Research Report
This report summarizes the findings of field trials and basic data collected in Haiti under the Feed the Future Peanut & Mycotoxin Innovation Lab project from 2014-2017. The focus of the research was to improve peanut productivity through management options for foliar diseases, low soil fertility, and other yield-limiting agronomic factors.
French translation:
https://extension.uga.edu/publications/detail.html?number=B1499-FR”>https://extension.uga.edu/publications/detail.html?number=B1499-FR|
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Drip, trickle, microemitters, and subsurface irrigation systems are considered low-volume irrigation. Low-volume irrigation systems are designed to improve irrigation efficiency, delivering water to the crop accurately with minimal water loss. Irrigation efficiency can be categorized into two main concepts: water loss and uniform application. If water loss is significant, or application uniformity is poor, efficiency will be low. Generally, the most significant loss of irrigation water is from overwatering, where the water percolates below the root zone, or from runoff. With good management, losses due to leaks, system drainage, and flushing of filters and lateral lines should not exceed 1%. Low-volume systems have the opportunity to achieve efficiency, and under careful management, will minimize losses from overirrigation. However, using low-volume systems requires increased irrigation frequency and soil moisture monitoring should be used to improve water-use efficiency. This publication covers system design, system efficiencies, components, chemical applications, diseases related to irrigation, and soil moisture monitoring.
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