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Powdery mildew

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130: 122: 482: 40: 508: 631: 276: 580: 623: 341:(baking soda) and vegetable or mineral oils in water are often recommended for controlling powdery mildew, but such mixtures have limited and inconsistent efficacy. While sodium bicarbonate has been shown to reduce to growth of mildews in lab tests, sprays containing only baking soda and water are not effective in controlling fungal diseases on infected plants, and high concentrations of sodium are harmful to plants. 114: 167:
infections of wheat and barley species, as compared to sexual reproduction. Yet sexual reproduction results in durable and resistant overwintering spores, produced in chasmothecia. These spores are dark (to protect against UV irradiation), round and thick-walled (to protect against freezing rupture), giving them the ability to survive throughout the winter. They will germinate in the spring for new infection.
89:. Powdery mildew is one of the easier plant diseases to identify, as the signs of the causal pathogen are quite distinctive. Infected plants display white powdery spots on the leaves and stems. This mycelial layer may quickly spread to cover all of the leaves. The lower leaves are the most affected, but the 728:
various cucurbit plants concluded that "race identification is important for basic research and is especially important for the commercial seed industry, which requires accuracy in declaring the type and level of resistance ... in its products". However, identifying specific races was seen as having
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has long been popular with home gardeners and small-scale organic growers as a treatment for powdery mildew. Milk is diluted with water (typically 1:10) and sprayed on susceptible plants at the first sign of infection, or as a preventative measure, with repeated weekly application often controlling
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Metal salt fungicides should be applied on a regular basis up until harvest of the host. Sulfur must be applied before the disease has emerged since it prevents fungi spores from germinating. Copper sulfate is an effective fungicide allowed in organic farming, but can cause harm to the host plant.
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of the fungus, identified simply as race 1, race 2, etc. (seven in total by 2004), for races found around the world, and race N1 through N4 for some divergent races native to Japan. Various subraces have been identified, and given names such as race 2U.S., race 3.5, and race 4.5. A new race S was
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mature and are released to initiate new infections. Conditions necessary for spore maturation differ among species. In asexual reproduction, the mother fungi and offspring are genetically identical. Asexual reproduction is the predominant form of reproduction and dispersal in powdery mildew
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are an effective way to manage powdery mildew disease on plants. Spray programs of conventional fungicides are advised to begin when powdery mildew symptoms and signs are first noticed. Conventional fungicides should be applied on a regular basis for best results against the disease.
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and moderate temperatures; greenhouses provide an ideal moist, temperate environment for the spread of the disease. This causes harm to agricultural and horticultural practices where powdery mildew may thrive in a greenhouse setting. In an agricultural or horticultural setting, the
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in which genetic recombination takes place. Ascocarps including chasmothecia, apothecia, perithecia, and pseudothecia, are the fruiting bodies unique to fungi in the Ascomycota phylum (known as ascomycetes). Within each ascocarp are several
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can be controlled using chemical methods, bio-organic methods, and genetic resistance. It is important to be aware of powdery mildew and its management strategies as the resulting disease can significantly reduce important crop yields.
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Wang, Yanpeng; Cheng, Xi; Shan, Qiwei; Zhang, Yi; Liu, Jinxing; Gao, Caixia; Qiu, Jin-Long (2014). "Simultaneous editing of three homoeoalleles in hexaploid bread wheat confers heritable resistance to powdery mildew".
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effectively manages powdery mildew on many plants by interfering with the fungus' metabolism and terminating spore production. Sulfur and Fish Oil + Sesame Oil is a mixture effective against powdery mildew.
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In an agricultural setting, the pathogen can be controlled using chemical methods, genetic resistance, and careful farming methods. Some cultivated plants have varieties resistant to powdery mildew.
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BĂ©langer, R. R.; Benhamou, Nicole; Menzies, J. G. (2003). "Cytological Evidence of an Active Role of Silicon in Wheat Resistance to Powdery Mildew ( Blumeria graminis f. sp. tritici )".
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Some unconventional chemical control methods offer alternative modes of action. The most effective non-conventional methods of chemical control against powdery mildew are milk, natural
1465:"Compost Tea and Milk to Suppress Powdery Mildew (Podosphaera xanthii) on Pumpkins and Evaluation of Horticultural Pots Made from Recyclable Fibers Under Field Conditions" 1032:
Keinath, Anthony P.; DuBose, Virginia B. (2012-12-01). "Controlling powdery mildew on cucurbit rootstock seedlings in the greenhouse with fungicides and biofungicides".
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Powdery mildew growth can be limited by reducing humidity, such as by allowing space between plants for airflow, and pruning to thin foliage.
190:. Four closely related species of plant parasites from the powdery mildew genera were found to have lost between 5 and 21 of the 48 to 52 MMR 2320: 1092: 1187:
Hacquard, Stéphane; Kracher, Barbara; Maekawa, Takaki; Vernaldi, Saskia; Schulze-Lefert, Paul; Themaat, Emiel Ver Loren van (2013-06-11).
1908:), the Causal Agent of Powdery Mildew in Curcubits: Factors Affecting Race Identification and the Importance for Research and Commerce". 93:
can appear on any above-ground part of the plant. As the disease progresses, the spots get larger and denser as large numbers of asexual
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Zhu, M.; et al. (2017). "Very-long-chain aldehydes induce appressorium formation in ascospores of the wheat powdery mildew fungus
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of powdery mildews (especially in high-value crops such as grapes) has been ongoing since the 1970s, resulting in the development of
202:. These elevated mutation rates suggest that a lack of genes essential for accurate DNA replication can cause an increased rate of 1264:
Iyer, Ravi R.; Pluciennik, Anna; Burdett, Vickers; Modrich, Paul L. (2006-02-01). "DNA Mismatch Repair: Functions and Mechanisms".
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or eliminating the disease. Studies have shown milk's effectiveness as comparable to some conventional fungicides, and better than
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fungus that is a hyperparasite of powdery mildews. This parasitism reduces growth and may eventually kill the mildew. Research on
1626: 1189:"Mosaic genome structure of the barley powdery mildew pathogen and conservation of transcriptional programs in divergent hosts" 1998:
Pérez-García, A.; Romero, D.; Fernández-Ortuño, D.; López-Ruiz, F.; De Vicente, A.; Torés Montosa, Juan Antonio (March 2009).
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in successive generations, and how this may affect other recessive and codominant genes for resistance to other races of
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Ecofruit: 12th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-growing
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The Pm3 allele is an effective genetic resistance strategy that protects host species against powdery mildew fungus.
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genomes. The powdery mildew species with higher levels of MMR gene loss exhibited elevated rates of various types of
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Wicker, Thomas; Oberhaensli, Simone; Parlange, Francis; Buchmann, Jan P.; Shatalina, Margarita; et al. (2013).
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disease that affects a wide range of plants. Powdery mildew diseases are caused by many different species of
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Bettiol, Wagner (September 1999). "Effectiveness of cow's milk against zucchini squash powdery mildew (
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that contain ascospores. Powdery mildew fungi must be adapted to their host for successful infection.
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Bennett, J. Michael; Rhetoric, Emeritus; Hicks, Dale R.; Naeve, Seth L.; Bennett, Nancy Bush (2014).
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of plants for phytopathological resistance to particular fungal races involves a great deal of
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is a fungus that causes powdery mildew on tree leaves. This fungus attacks the leaves of the
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Powdery mildew fungi reproduce both sexually and asexually. Sexual reproduction occurs via
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differ from the other pathogen symptoms. Green-yellow spots appear on upper leaf surface.
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Chemical control of Powdery Mildew of Apple in warmer climates of Himachal Pradesh, India
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Section of leaf of cucumber showing powdery mildew infection, photo taken with Foldscope
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was formerly reported to be the primary causal organism throughout most of the world.
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when exposed to sunlight, and contact with these radicals is damaging to the fungus.
2282:. CBS Biodiversity Series. Vol. 11. Utrecht: CBS-KNAW Fungal Diversity Centre. 1958:"Inheritance of Resistance in Melon PI 313970 to Cucurbit Powdery Mildew Incited by 1937: 1359: 1296:
Phillips, Megan A; Steenwyk, Jacob L; Shen, Xing-Xing; Rokas, Antonis (2021-10-01).
1109:"The wheat powdery mildew genome shows the unique evolution of an obligate biotroph" 764:. Cucumbers in greenhouse environments have also been reported to be susceptible to 481: 2027: 2019: 1973: 1925: 1776: 1749: 1701: 1534: 1510: 1355: 1317: 1309: 1273: 1218: 1208: 1161: 1120: 1049: 825: 706: 516: 359: 203: 2056: 1602: 306:
at higher concentrations. Milk has proven effective in treating powdery mildew of
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Another non-conventional chemical treatment involves treating with a solution of
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for choosing specific cultivars, because of the rapidity with which the local
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Cohen, R.; Burger, Y.; Katzir, N. (2004). "Monitoring Physiological races of
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Tamm, Lucius; Amsler, Thomas; Schaerer, Hansjakob; Refardt, Mathias (2006).
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Powdery mildew on a maple leaf as seen under a scanning electron microscope
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are formed, and the mildew may spread up and down the length of the plant.
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Harveson, R.M.; Markell, S.G.; Block, C.C.; Gulya, T.J., eds. (2016).
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fungi can cause powdery mildew in cucurbits: The most frequent, after
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population can change geographically, seasonally, and by host plant.
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bread wheat to powdery mildew via targeted mutations with the use of
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of melons being developed for resistance to successively arising
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Spores of powdery mildew on cucumber leaf seen through Foldscope
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Sunflower powdery mildew is a disease caused by the pathogens
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to increase resistance in other cultivars. Such modern
1895: 1893: 1775:. American Phytopathological Society. pp. 20–22. 2280:
Taxonomic Manual of the Erysiphales (Powdery Mildews)
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McCreight, James D.; Coffey, Michael D. (June 2011).
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Disease Management Strategies for Horticultural Crops
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Powdery mildew growing on a leaf (high magnification)
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Powdery mildew grows well in environments with high
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discovered in 2003, and a specific melon cultivar (
1738: 693:'PI 313970') found resistant to it, then used for 1899: 1410:"Powdery Mildew: Symptoms, Treatment and Control" 760:is another, sometimes considered synonymous with 2312: 1944: 1797: 1624:Powdery Mildew – Sustainable Gardening Australia 220: 2208: 1955: 1193:Proceedings of the National Academy of Sciences 536:The fungus causing powdery mildew of onions is 2048: 1291: 1289: 1287: 2054: 1031: 783:is a fungus that can cause powdery mildew in 374:. With silicon treatment, epidermal cells of 186:. This system can also repair some forms of 44:Example of powdery mildew (right) along with 125:Powdery mildew growing on a leaf (magnified) 117:Powdery mildew on a recently infected plant. 2263:in the Pesticide Properties DataBase (PPDB) 2183:Pacific Northwest Pest Management Handbooks 1284: 1244: 1242: 1027: 1025: 1023: 895:List of hemp diseases § Powdery mildew 2166: 1839: 1837: 1835: 1773:Compendium of Sunflower Diseases and Pests 1343: 1341: 860:is a fungus that causes powdery mildew on 38: 2277: 2055:Velkov, Nikolay; Masheva, Stoika (2002). 2031: 1867: 1865: 1769:"Part I: Biotic Diseases §Powdery Mildew" 1563: 1321: 1222: 1212: 1124: 1000: 2226: 1845:"Powdery Mildew of Cucurbits fact sheet" 1528: 1526: 1524: 1484: 1482: 1458: 1456: 1239: 1020: 629: 621: 578: 506: 480: 378:are less susceptible to powdery mildew. 274: 128: 120: 112: 1832: 1488: 1347: 1338: 14: 2313: 1862: 1573:Puyallup Research and Extension Center 1559: 1557: 284:Addition of lime hampers this effect. 2172: 1521: 1479: 1453: 1437: 1433: 1431: 1429: 1404: 1402: 1375: 1371: 1369: 1251:"Powdery Mildew in the Flower Garden" 1248: 381: 2064:Cucurbit Genetics Cooperative Report 1643:Organic Fruit Production in Michigan 1087: 1085: 1060: 724:regarding powdery mildew races that 404: 2321:Fungal plant pathogens and diseases 2090:"Problem: Powdery Mildew of Lilac ( 1849:Vegetablemdonline.ppath.cornell.edu 1554: 1462: 1139: 553: 389:In 2014, resistance was induced in 24: 2270: 2008:), a constant threat to cucurbits" 1532: 1426: 1399: 1366: 899:Caused by several fungi including 800:is the cause of powdery mildew in 542:(also known by its anamorph name, 206:and evolutionary diversification. 25: 2337: 2306: 1535:"A Dairy Solution to Mildew Woes" 1082: 920: 253:Non-conventional chemical control 2278:Braun, U.; Cook, R.T.A. (2012). 2173:Ocamb, Cynthia M. (2015-09-11). 2024:10.1111/j.1364-3703.2008.00527.x 1807:The Minnesota Soybean Field Book 485:Powdery mildew on soybean leaves 2252: 2220: 2185:. Pacific Northwest Extension ( 2136: 2111: 2082: 1760: 1732: 1712: 1685: 1655: 1636: 1617: 1587: 1360:10.17660/ActaHortic.2005.696.61 1099:. July 14, 2013. Archived from 1001:Ciliberto, Giada (2024-03-31). 850: 790: 709:to propagate a recessive gene, 194:that are present in most other 137: 1257: 1180: 994: 867: 813: 57:Species of fungi in the order 13: 1: 1575:. Washington State University 1515:10.1016/s0261-2194(99)00046-0 1493:) in greenhouse conditions". 987: 409: 347:is an effective low-toxicity 221:Conventional chemical control 209: 170: 1302:Genome Biology and Evolution 1166:10.1016/j.funbio.2017.05.003 1054:10.1016/j.cropro.2012.06.009 933:fungi, species of the genus 717:"remains to be determined". 591:can cause powdery mildew of 7: 2000:"The powdery mildew fungus 1706:10.1094/PHYTO.2003.93.4.402 1467:. University of Connecticut 970: 886: 583:Powdery mildew of cucurbits 574: 524:) causes powdery mildew of 461:, causes powdery mildew of 417:Golovinomyces cichoracearum 351:against powdery mildew and 241:. It is also possible with 10: 2342: 2217:, retrieved December 2015. 1440:"Using Organic Fungicides" 1072:Small Grain Wheat Diseases 967:as the active ingredient. 892: 476: 443: 439: 272:, metal salts, and oils. 162:Under optimal conditions, 2012:Molecular Plant Pathology 1978:10.21273/HORTSCI.46.6.838 1781:10.1094/9780890545096.002 1669:. In Boos, Markus (ed.). 1348:Gupta, D.; Sharma, J.NL. 877:causes powdery mildew on 773: 563:causes powdery mildew of 531: 502: 432:. The symptoms caused by 401:gene-editing technology. 337:Dilute sprays containing 233:Control is possible with 64: 53: 37: 32: 804:and other Rosaceae like 471:powdery mildew of barley 1214:10.1073/pnas.1306807110 902:Golovinomyces ambrosiae 670:) caused by the fungus 664:cucurbit powdery mildew 656:Since 1925, commercial 560:Podosphaera leucotricha 546:). It also infects the 511:Powdery mildew of grape 446:Powdery mildew (barley) 2227:Franceschini, Sergio. 1906:Sphaerotheca fuliginea 1564:Chalker-Scott, Linda. 1491:Sphaerotheca fuliginea 948:Ampelomyces quisqualis 751:Erysiphe cichoracearum 650:Erysiphe cichoracearum 645:Sphaerotheca fuliginea 635: 627: 584: 512: 486: 280: 134: 126: 118: 2092:Microsphaera syringae 1540:Science News Magazine 1378:"Measure for Control" 1249:Grabowski, Michelle. 914:Podosphaera macularis 893:Further information: 874:Golovinomyces orontii 780:Microsphaera syringae 740:At least three other 633: 625: 582: 510: 484: 444:Further information: 345:Potassium bicarbonate 278: 270:potassium bicarbonate 132: 124: 116: 2123:Encyclopedia of Life 1877:Cucurbitbreeding.com 1820:on 30 September 2013 1742:Nature Biotechnology 883:(rockcress) leaves. 587:Multiple species of 496:Microsphaera diffusa 27:Fungal plant disease 2006:Podosphaera xanthii 1960:Podosphaera xanthii 1922:2004Phyto..32..174C 1902:Podosphaera xanthii 1507:1999CrPro..18..489B 1314:10.1093/gbe/evab219 1205:2013PNAS..110E2219H 1158:2017FunB..121..716Z 1046:2012CrPro..42..338K 943:of powdery mildew. 857:Erysiphe berberidis 810:(the water avens). 797:Podosphaera aphanis 673:Podosphaera xanthii 640:Podosphaera xanthii 423:Podosphaera xanthii 249:, and penconazole. 176:DNA mismatch repair 85:fungi in the order 1930:10.1007/BF02979784 1648:2012-02-16 at the 1629:2016-03-03 at the 1463:DeBacco, Matthew. 1438:Beckerman, Janna. 1376:Petterson, James. 957:biological control 829:(Norway maple) in 767:Leveillula taurica 729:little utility in 699:selective breeding 636: 628: 585: 539:Leveillula taurica 513: 493:, are affected by 487: 429:Leveillula taurica 382:Genetic resistance 339:sodium bicarbonate 330:, produces oxygen 281: 204:sequence evolution 135: 127: 119: 2289:978-90-70351-89-2 2179:)-Powdery Mildew" 2002:Podosphaera fusca 1790:978-0-89054-509-6 1382:Projects.ncsu.edu 1278:10.1021/cr0404794 1142:Blumeria graminis 820:Sawadaea tulasnei 757:Podosphaera fusca 722:literature review 544:Oidiopsis taurica 489:Legumes, such as 465:, whereas f. sp. 452:Blumeria graminis 405:In specific crops 366:and by producing 72: 71: 16:(Redirected from 2333: 2301: 2264: 2256: 2250: 2249: 2247: 2246: 2240: 2234:. Archived from 2233: 2224: 2218: 2212: 2206: 2205: 2203: 2202: 2170: 2164: 2163: 2161: 2159: 2150:. Archived from 2148:Pnwhandbooks.org 2140: 2134: 2133: 2131: 2129: 2115: 2109: 2108: 2106: 2105: 2096:. Archived from 2086: 2080: 2079: 2077: 2075: 2061: 2052: 2046: 2045: 2035: 1995: 1989: 1988: 1986: 1984: 1953: 1942: 1941: 1910:Phythoparasitica 1897: 1888: 1887: 1885: 1883: 1869: 1860: 1859: 1857: 1855: 1841: 1830: 1829: 1827: 1825: 1819: 1812: 1801: 1795: 1794: 1764: 1758: 1757: 1754:10.1038/nbt.2969 1736: 1730: 1729: 1727: 1726: 1716: 1710: 1709: 1689: 1683: 1682: 1680: 1678: 1673:. pp. 87–92 1668: 1659: 1653: 1640: 1634: 1621: 1615: 1614: 1612: 1610: 1601:. Archived from 1591: 1585: 1584: 1582: 1580: 1570: 1561: 1552: 1551: 1549: 1547: 1530: 1519: 1518: 1486: 1477: 1476: 1474: 1472: 1460: 1451: 1450: 1444: 1435: 1424: 1423: 1421: 1420: 1406: 1397: 1396: 1394: 1393: 1384:. 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Archived from 1068:"Powdery Mildew" 1064: 1058: 1057: 1029: 1018: 1017: 1015: 1014: 1007:retididedalus.it 998: 927:Sphaeropsidaceae 826:Acer platanoides 703:genetic research 554:Apples and pears 522:Uncinula necator 517:Erysiphe necator 360:calcium silicate 267: 42: 30: 29: 21: 18:Powdery (mildew) 2341: 2340: 2336: 2335: 2334: 2332: 2331: 2330: 2311: 2310: 2309: 2304: 2290: 2273: 2271:Further reading 2268: 2267: 2257: 2253: 2244: 2242: 2238: 2231: 2225: 2221: 2215:faculty.ucr.edu 2213: 2209: 2200: 2198: 2177:Cannabis sativa 2171: 2167: 2157: 2155: 2142: 2141: 2137: 2127: 2125: 2117: 2116: 2112: 2103: 2101: 2088: 2087: 2083: 2073: 2071: 2059: 2053: 2049: 1996: 1992: 1982: 1980: 1954: 1945: 1898: 1891: 1881: 1879: 1871: 1870: 1863: 1853: 1851: 1843: 1842: 1833: 1823: 1821: 1817: 1810: 1802: 1798: 1791: 1765: 1761: 1737: 1733: 1724: 1722: 1718: 1717: 1713: 1690: 1686: 1676: 1674: 1666: 1660: 1656: 1650:Wayback Machine 1641: 1637: 1631:Wayback Machine 1622: 1618: 1608: 1606: 1593: 1592: 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1694:Phytopathology 1684: 1654: 1635: 1616: 1599:Attra.ncat.org 1586: 1553: 1520: 1501:(8): 489–492. 1478: 1452: 1425: 1414:Planet Natural 1398: 1365: 1337: 1283: 1272:(2): 302–323. 1256: 1238: 1179: 1152:(8): 716–728. 1146:Fungal Biology 1132: 1103:on 2013-08-21. 1081: 1078:on 2002-12-23. 1059: 1019: 992: 991: 989: 986: 985: 984: 982:Oidium (genus) 979: 972: 969: 963:which contain 941:hyperparasites 925:In the family 922: 921:Hyperparasites 919: 890: 885: 869: 866: 852: 849: 815: 812: 792: 789: 775: 772: 576: 573: 555: 552: 533: 530: 504: 501: 478: 475: 441: 438: 411: 408: 406: 403: 383: 380: 264: 254: 251: 222: 219: 211: 208: 172: 169: 148:cleistothecium 139: 136: 75:Powdery mildew 70: 69: 66: 62: 61: 55: 51: 50: 43: 35: 34: 33:Powdery mildew 26: 9: 6: 4: 3: 2: 2338: 2327: 2324: 2322: 2319: 2318: 2316: 2299: 2295: 2291: 2285: 2281: 2276: 2275: 2262: 2261: 2255: 2241:on 2011-07-19 2237: 2230: 2223: 2216: 2211: 2196: 2192: 2188: 2184: 2180: 2178: 2169: 2154:on 2016-08-16 2153: 2149: 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Index

Powdery (mildew)

Downy mildew
Erysiphales
fungal
ascomycete
Erysiphales
mildew
spores
humidity
pathogen



chasmothecia
cleistothecium
ascocarp
asci
ascospores
DNA mismatch repair
DNA replication
recombination
DNA damage
genes
ascomycete
mutation
sequence evolution
fungicides
triadimefon
propiconazole

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