{"id":11725,"date":"2021-08-25T11:22:22","date_gmt":"2021-08-25T09:22:22","guid":{"rendered":"http:\/\/www.ideaverdemaschi.com\/?p=11725"},"modified":"2021-08-25T15:09:23","modified_gmt":"2021-08-25T13:09:23","slug":"il-ritorno-del-mal-bianco","status":"publish","type":"post","link":"https:\/\/www.ideaverdemaschi.com\/en\/il-ritorno-del-mal-bianco\/","title":{"rendered":"Il ritorno del mal bianco"},"content":{"rendered":"<p>[vc_row gap=&#8221;20&#8243; content_placement=&#8221;middle&#8221; mobile_bg_img_hidden=&#8221;no&#8221; tablet_bg_img_hidden=&#8221;no&#8221; woodmart_parallax=&#8221;0&#8243; woodmart_gradient_switch=&#8221;no&#8221; row_reverse_mobile=&#8221;0&#8243; row_reverse_tablet=&#8221;0&#8243; woodmart_disable_overflow=&#8221;0&#8243; css=&#8221;.vc_custom_1605792656353{padding-top: 3vh !important;padding-bottom: 3vh !important;}&#8221;][vc_column][vc_column_text text_larger=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;]<\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Il mal bianco o oidio \u00e8 una malattia fungina che prende nome dai sintomi che manifesta: una patina bianca sulle foglie, quasi fossero <\/span><b>chiazze di farina<\/b><span style=\"font-weight: 400;\">, che avvolgono ben presto tutta la pianta, virando poi al color bronzo e terminando con il disseccamento delle foglie stesse. Se non curata, questa malattia pu\u00f2 mettere in pericolo la sopravvivenza della nostra amica verde.<\/span><\/p>\n<p style=\"text-align: left;\"><b>Le piante pi\u00f9 colpite<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">La malattia \u00e8 causata da <\/span><b>diverse specie di funghi<\/b><span style=\"font-weight: 400;\"> che<\/span> <span style=\"font-weight: 400;\">colpiscono praticamente tutte le piante floreali e ornamentali, quelle da orto e da frutto. Quelle in assoluto pi\u00f9 colpite sono i rosai, tutti gli <\/span><b>evonimi a foglia morbida<\/b><span style=\"font-weight: 400;\">, la verbena e le petunie\/surfinie, il lauroceraso, la salvia, tutte le Cucurbitacee e soprattutto zucchino e cetriolo.<\/span><\/p>\n<p style=\"text-align: left;\"><b>I danni del mal bianco<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Il mal bianco aggredisce le foglie e i germogli, dove prima appaiono chiazze singole che poi si trasformano in una patina biancastra, farinosa, che poi rende le foglie e i germogli di colore bronzeo, fino a farli seccare. I funghi patogeni sono <\/span><b>favoriti da un ambiente umido e tiepido ma non troppo caldo<\/b><span style=\"font-weight: 400;\"> (temperatura ideale tra 15 e 23 \u00b0C), e da piogge o irrigazioni che bagnano il fogliame, fattore che aiuta le spore (\u201csemi\u201d dei funghi) ad andare da una foglia all\u2019altra e da una pianta all\u2019altra. Quindi <\/span><b>la primavera e l\u2019autunno<\/b><span style=\"font-weight: 400;\"> sono le stagioni in cui pi\u00f9 facilmente si manifesta l\u2019oidio in pianura, mentre in collina e montagna \u00e8 pi\u00f9 facile che si presenti durante l\u2019estate.<\/span><\/p>\n<p style=\"text-align: left;\"><b>Prevenire l\u2019oidio<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Come sempre, prevenire \u00e8 sempre meglio che curare. Quindi, soprattutto se coltiviamo le piante citate come bersaglio prediletto, piantiamole a <\/span><b>un\u2019adeguata distanza<\/b><span style=\"font-weight: 400;\"> l\u2019una dall\u2019altra per favorire l\u2019arieggiamento; <\/span><b>sfoltiamo<\/b><span style=\"font-weight: 400;\"> la chioma con potature in inverno e tagli di alleggerimento in estate; <\/span><b>irrighiamo<\/b><span style=\"font-weight: 400;\"> direttamente sul terreno per non bagnare il fogliame; evitiamo di infliggere <\/span><b>ferite<\/b><span style=\"font-weight: 400;\"> (da potatura, da decespugliatore, da urto meccanico ecc.) alle piante; <\/span><b>eliminiamo<\/b><span style=\"font-weight: 400;\"> subito tutto il materiale infetto, comprese le foglie cadute, dove le spore rimangono d\u2019inverno da un anno all\u2019altro; applichiamo alle piante <\/span><b>preparati rinforzanti<\/b><span style=\"font-weight: 400;\"> \u2013 i \u201ccorroboranti\u201d come propoli, lecitina, zeolite ecc. \u2013 che irrobustiscono le difese dell\u2019esemplare e la cuticola delle foglie.<\/span><\/p>\n<p style=\"text-align: left;\"><b>Combattere il mal bianco<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Appena notiamo le chiazze bianche, trattiamo subito con un prodotto a base di <\/span><b>bicarbonato<\/b><span style=\"font-weight: 400;\"> se l\u2019infezione \u00e8 ai primi stadi e poco estesa, oppure, se la situazione ci \u00e8 sfuggita dal controllo, con <\/span><b>zolfo<\/b><span style=\"font-weight: 400;\"> in polvere o zolfo solubile in acqua da applicare bene su tutta la vegetazione, inclusi gli steli e la pagina inferiore delle foglie. Ripetiamo l\u2019intervento dopo ogni pioggia e dopo 7-10 giorni fino alla completa scomparsa dei sintomi (le foglie rimarranno biancastre, ma non se ne ammaleranno altre). Su balconi e terrazzi possiamo utilizzare anche prodotti corroboranti a base di <\/span><b>propoli<\/b><span style=\"font-weight: 400;\">, che hanno anche una funzione curativa, rispettando sempre le indicazioni in etichetta.\u00a0<\/span><\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=&#8221;.vc_custom_1605792695990{padding-top: 3vh !important;padding-bottom: 3vh !important;}&#8221; mobile_bg_img_hidden=&#8221;no&#8221; tablet_bg_img_hidden=&#8221;no&#8221; woodmart_parallax=&#8221;0&#8243; woodmart_gradient_switch=&#8221;no&#8221; row_reverse_mobile=&#8221;0&#8243; row_reverse_tablet=&#8221;0&#8243; woodmart_disable_overflow=&#8221;0&#8243;][vc_column width=&#8221;1\/3&#8243; css=&#8221;.vc_custom_1620048927657{background-color: #515151 !important;}&#8221; mobile_bg_img_hidden=&#8221;no&#8221; tablet_bg_img_hidden=&#8221;no&#8221; woodmart_parallax=&#8221;0&#8243; woodmart_sticky_column=&#8221;false&#8221; parallax_scroll=&#8221;no&#8221; mobile_reset_margin=&#8221;no&#8221; tablet_reset_margin=&#8221;no&#8221;][vc_single_image image=&#8221;11205&#8243; img_size=&#8221;large&#8221; woodmart_inline=&#8221;no&#8221; parallax_scroll=&#8221;no&#8221; css=&#8221;.vc_custom_1620048921443{padding-top: 10px !important;padding-right: 10px !important;padding-bottom: 10px !important;padding-left: 10px !important;}&#8221;][\/vc_column][vc_column width=&#8221;2\/3&#8243;][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row gap=&#8221;20&#8243; content_placement=&#8221;middle&#8221; mobile_bg_img_hidden=&#8221;no&#8221; tablet_bg_img_hidden=&#8221;no&#8221; woodmart_parallax=&#8221;0&#8243; woodmart_gradient_switch=&#8221;no&#8221; row_reverse_mobile=&#8221;0&#8243; row_reverse_tablet=&#8221;0&#8243; woodmart_disable_overflow=&#8221;0&#8243; css=&#8221;.vc_custom_1605792656353{padding-top: 3vh !important;padding-bottom: 3vh !important;}&#8221;][vc_column][vc_column_text text_larger=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;] Il mal bianco o oidio \u00e8 una [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[],"tags":[],"class_list":["post-11725","post","type-post","status-publish","format-standard","hentry"],"acf":{"choi\u0441e_menu_page":false,"full_width":false,"header_transparent":false,"header_white":false,"menu_align_page":"default","menu_style":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - 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