Succinate dehydrogenase (SDH) or succinate-coenzyme Q reductase (SQR) or respiratory complex II is an enzyme complex, found in many bacterial cells and in the inner mitochondrial membrane of eukaryotes. It is the only enzyme that participates in both the citric acid cycle and oxidative phosphorylation. Histochemical analysis showing high succinate dehydrogenase in muscle demonstrates high mitochondrial content and high oxidative potential.
Red Delicious is a type of apple with a red exterior and sweet taste that was first recognized in Madison County, Iowa, in 1872. Today, the name Red Delicious comprises more than 50 cultivars. It was the most produced cultivar in the United States from 1968 to 2018, when it was surpassed by Gala.
Apple scab is a common disease of plants in the rose family (Rosaceae) that is caused by the ascomycete fungus Venturia inaequalis. While this disease affects several plant genera, including Sorbus, Cotoneaster, and Pyrus, it is most commonly associated with the infection of Malus trees, including species of flowering crabapple, as well as cultivated apple. The first symptoms of this disease are found in the foliage, blossoms, and developing fruits of affected trees, which develop dark, irregularly-shaped lesions upon infection. Although apple scab rarely kills its host, infection typically leads to fruit deformation and premature leaf and fruit drop, which enhance the susceptibility of the host plant to abiotic stress and secondary infection. The reduction of fruit quality and yield may result in crop losses of up to 70%, posing a significant threat to the profitability of apple producers. To reduce scab-related yield losses, growers often combine preventive practices, including sanitation and resistance breeding, with reactive measures, such as targeted fungicide or biocontrol treatments, to prevent the incidence and spread of apple scab in their crops.
Papaya ringspot virus (PRSV) is a pathogenic plant virus in the genus Potyvirus and the virus family Potyviridae which primarily infects the papaya tree.
The American Phytopathological Society (APS) is an international scientific organization devoted to the study of plant diseases (phytopathology). APS promotes the advancement of modern concepts in the science of plant pathology and in plant health management in agricultural, urban and forest settings.
Aplets & Cotlets is a confection similar to Turkish delight, associated with the U.S. state of Washington. The candy was first developed in 1918 by apple farmers as a way to dispose of surplus crops. A 2009 effort to legally designate Aplets & Cotlets as Washington's official candy failed due to provincial competition between legislators from the state's two geo-cultural regions.
This article summarizes different crops, what common fungal problems they have, and how fungicide should be used in order to mitigate damage and crop loss. This page also covers how specific fungal infections affect crops present in the United States.
Stemilt Growers, owned by the Mathison family, is a family-owned tree fruit growing, packing and shipping company based in Wenatchee, Washington. Stemilt is the largest fresh market sweet cherry shipper in the world, and one of the nation's largest grower-packer-shippers of apples, pears, cherries, and stone fruit. Its signature apple varieties include Piñata, Honeycrisp, Gala, and Pink Lady. The company is also a leader in organic fruit production, producing 26% of Washington's organic apples and 32% of the Pacific Northwest's organic pears. In 2008, the company shipped over 20 million boxes of fruit and employed 1,500 people full-time.
Dryden is a small unincorporated community in Chelan County, Washington, United States. It is situated along the Wenatchee River in the fertile Wenatchee Valley between the towns of Cashmere and Leavenworth. The community serves as a supply and shipping point for local farms and orchards.
The northwestern U.S. state of Washington's economy grew 3.7% in 2016, nearly two and a half times the national rate. Average income per head in 2009 was $41,751, 12th among states of the U.S.
Cherry leaf spot is a fungal disease which infects cherries and plums. Sweet, sour, and ornamental cherries are susceptible to the disease, being most prevalent in sour cherries. The variety of sour cherries that is the most susceptible are the English morello cherries. This is considered a serious disease in the Midwest, New England states, and Canada. It has also been estimated to infect 80 percent of orchards in the Eastern states. It must be controlled yearly to avoid a significant loss of the crop. If not controlled properly, the disease can dramatically reduce yields by nearly 100 percent. The disease is also known as yellow leaf or shothole disease to cherry growers due to the characteristic yellowing leaves and shot holes present in the leaves upon severe infection.
Fluxapyroxad is a broad-spectrum pyrazole-carboxamide fungicide used on a large variety of commercial crops. It stunts fungus growth by inhibiting the succinate dehydrogenase (SQR) enzyme. Application of fluxapyroxad helps prevent many wilts and other fungal infections from taking hold. As with other systemic pesticides that have a long chemical half-life, there are concerns about keeping fluxapyroxad out of the groundwater, especially when combined with pyraclostrobin. There is also concern that some fungi may develop resistance to fluxapyroxad.
Cosmic Crisp is an American apple with the variety designation 'WA 38'. Breeding began in 1997 at the Washington State University (WSU) Tree Fruit Research and Extension Center in Wenatchee, Washington, and was initially overseen by Bruce Barritt. Kate Evans completed the research after Barritt's retirement from WSU.
The US state of Maryland has large areas of fertile agricultural land in its coastal and Piedmont zones, though this land use is being encroached upon by urbanization. Agriculture is oriented to dairy farming for nearby large city milksheads, plus specialty perishable horticulture crops, such as cucumbers, watermelons, sweet corn, tomatoes, melons, squash, and peas.
EverCrisp is an American apple cultivar developed by the Midwest Apple Improvement Association (MAIA). Trademarked as EverCrisp, the MAIA-1 variety is a cross between two existing apple cultivars: the Honeycrisp and Fuji. Originally produced in Ohio, EverCrisp has since expanded to apple-growing regions across the Midwest in Michigan, Illinois and Indiana, in the Northeast in Pennsylvania and New York, and in the Northwest in Washington. The apple entered the public marketplace in 2017.
Robert Harry Stover was a Canadian-Honduran phytopathologist specializing in Musa crops and their fungal diseases.
Bitter rot of apple is a fungal disease of apple fruit that is caused by several species in the Colletotrichum acutatum and Colletotrichum gloeosporioides species complexes. It is identified by sunken circular lesions with conical intrusions into the apple flesh that appear V-shaped when the apple is cut in half through the center of the lesion. It is one of the most devastating diseases of apple fruit in regions with warm wet weather.
Boscalid is a broad spectrum fungicide used in agriculture to protect crops from fungal diseases. It was first marketed by BASF in 2002 using their brand name Endura. The compound is an biphenyl amide derived inhibitor of succinate dehydrogenase.
WA 64 is a hybrid apple variety developed at Washington State University (WSU). It is a Honeycrisp crossed with Pink Lady apple. The first WA 64 apples were planted at the Stemilt Growers orchard in Quincy, Washington in 2015. Availability at retail to the public may begin in 2029, six years after its introduction in 2023.
