{"id":257,"date":"2013-12-02T21:16:42","date_gmt":"2013-12-02T20:16:42","guid":{"rendered":"http:\/\/www.okusnivrt.com\/novice\/?p=257"},"modified":"2013-12-02T21:16:42","modified_gmt":"2013-12-02T20:16:42","slug":"crna-listna-pegavost","status":"publish","type":"post","link":"https:\/\/www.okusnivrt.com\/novice\/crna-listna-pegavost\/","title":{"rendered":"\u010crna listna pegavost"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-258\" alt=\"\u010drna listna pegavost\" src=\"http:\/\/www.okusnivrt.com\/novice\/wp-content\/uploads\/2013\/12\/alternaria-300x200.jpg\" width=\"300\" height=\"200\" srcset=\"https:\/\/www.okusnivrt.com\/novice\/wp-content\/uploads\/2013\/12\/alternaria-300x200.jpg 300w, https:\/\/www.okusnivrt.com\/novice\/wp-content\/uploads\/2013\/12\/alternaria.jpg 768w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>\u010crno listno pegavost \u0161tevilnih rastlin povzro\u010dajo glive iz rodu <em>Alternaria<\/em>. Tako npr. gliva <em>A. brassicae<\/em> povzro\u010da \u010drno listno pegavost kapusnic, medtem ko gliva <em>A. solani<\/em> povzro\u010da \u010drno listno pegavost na krompirju in <a title=\"Kako uspe\u0161no gojiti paradi\u017enik\" href=\"http:\/\/www.okusnivrt.com\/novice\/kako-uspesno-gojimo-paradiznik\/\">paradi\u017eniku<\/a>.<\/p>\n<h2>Simptomi<\/h2>\n<p>Gliva oku\u017ei vse nadzemne organe, pri \u010demer so znamenja oku\u017ebe na vseh organih podobna. Na listih se pojavijo rjavo\u010drne okroglaste do ovalne pege z bolj ali manj vidnimi temnimi koncentri\u010dnimi krogi. Pege so pogosto obrobljene z rumenim robom. S \u010dasom se pege med seboj zdru\u017eujejo, listi za\u010dno rjaveti, se zvijati in su\u0161iti. Oku\u017eba se obi\u010dajno najprej pojavi na spodnjih (starej\u0161ih) listih in se nato \u0161iri na zgornje liste ter oku\u017ei tudi plodove. Oku\u017eeni plodovi za\u010dno v in ob pegah pokati in gniti, kar vodi do sekundarnih oku\u017eb s saprofitskimi glivami in bakterijami. Sledi kar \u0161e pospe\u0161i propadanje plodov in celotne rastline.<\/p>\n<p>Patogen <em>P. viticola<\/em> prezimi v obliki oospor v odmrlem rastlinskem materialu, v\u010dasih pa tudi v oku\u017eenih vejah. Med vla\u017enim spomladanskim obdobjem oospore kalijo in tvorijo sporangije. Sporangiji ali zoospore se nato z vetrom prenesejo na liste, kjer oku\u017eijo rastlino skozi listne re\u017ee. Skozi listne re\u017ee micelij po\u017eene sporangijofore, ki slu\u017eijo za hitro raz\u0161irjanje oku\u017ebe in\/ali sekundarno oku\u017ebo. Za sam razvojni krog je potrebno od 5 so 18 dni, kar je odvisno od vla\u017enosti, temperature in drugih faktorjev.<\/p>\n<h2>Za\u0161\u010dita<\/h2>\n<p>Najbolj\u0161i protiukrep je vsekakor preventiva, saj je bolezen po pojavitvi precej te\u017eje kontrolirati. Naju\u010dinkovitej\u0161a je kombinacija razlicnih protiukrepov:<\/p>\n<ul>\n<li>Glede na to da gliva pre\u017eivi na inficiranih ostankih rastlin, je pomembno, da le-te ob koncu rastne sezone odstranimo z vrta oziroma polja in tako prepre\u010dimo nadaljnjo oku\u017ebo naslednja leta.<\/li>\n<li>Rastline sadimo na son\u010dno in zra\u010dno lego, kjer ni pogostih jutranjih ros oziroma se rosa prej posu\u0161i.<\/li>\n<li>Uporabljati moramo neoku\u017eena semena in sadike.<\/li>\n<li>Izogibati se moramo <a title=\"Poskrbite, da rastline ne bodo \u017eejne\" href=\"http:\/\/www.okusnivrt.com\/novice\/zalivanje-rastlin\/\">zalivanju<\/a> po listih, kar \u0161e posebej to velja za ve\u010derne ure, ko bi se vlaga dolgo \u010dasa zadr\u017eevala na listih.<\/li>\n<li>Na manj\u0161ih povr\u0161inah lahko odtrgamo oku\u017eene liste in tako zmanj\u0161amo nadaljnjo \u0161iritev oku\u017ebe.<\/li>\n<li>Obvezno je kolobarjenje, predvsem moramo vkljucevati rastline, ki ne pripadajo dru\u017eini razhudnikovk.<\/li>\n<li>Vzdr\u017eevanje fertilnosti zemlje, \u0161e posebej moramo paziti, da ne pride do <a title=\"Poskrbite za kvalitetno prehrano rastlin\" href=\"http:\/\/www.okusnivrt.com\/novice\/poskrbite-za-kvalitetno-prehrano-rastlin\/\">pomanjkanja du\u0161ika<\/a> (bolezen je namre\u010d pogosto povezana s pomanjkanjem du\u0161ika, zlasti proti koncu rastne sezone).<\/li>\n<li>Sajenje sort, ki so (bolj) odporne na \u010drno listno pegavost.<\/li>\n<li>Uporaba fungicidov. Uporaba fungicidov je predvsem smiselna, \u010de se bolezen pojavi do vklju\u010dno prve polovice avgusta. V kolikor se namrec pojavi kasneje ne naredi toliko \u0161kode na plodovih, da bi bilo \u0161kropljenje smiselno.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u010crno listno pegavost \u0161tevilnih rastlin povzro\u010dajo glive iz rodu Alternaria. Tako npr. gliva A. brassicae povzro\u010da \u010drno listno pegavost kapusnic, medtem ko gliva A. solani povzro\u010da \u010drno listno pegavost na krompirju in paradi\u017eniku. Simptomi Gliva oku\u017ei vse nadzemne organe, pri \u010demer so znamenja oku\u017ebe na vseh organih podobna. Na listih se pojavijo rjavo\u010drne okroglaste do &hellip; <a href=\"https:\/\/www.okusnivrt.com\/novice\/crna-listna-pegavost\/\" class=\"more-link\">Preberi ve\u010d <span class=\"screen-reader-text\">\u010crna listna pegavost<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":258,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[36],"tags":[38,48],"class_list":["post-257","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bolezni","tag-glive","tag-glivne-bolezni"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u010crna listna pegavost - Okusni vrt<\/title>\n<meta name=\"description\" content=\"\u010crno listno pegavost \u0161tevilnih rastlin povzro\u010dajo glive iz rodu Alternaria. 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