lucienna писал(а):[А Ролик у меня прикуплен, еще попробую в следующем сезоне.
Всё таки сорт УЖЕ старый, то есть сейчас всё таки стОит поискать те что в описании имеют упомянание об уст. к Мучн Р., а у вас всё таки влажный регион. Иначе очень сложно предотвратить отмирание листовой пластины и.. кирдык - сезон и закончился. Производители семян любят гибриды штамповать так как им это выгодно, точнее ОЧЕНь выгодно... отсюда всякая гибридная мутатень типо подсолнечника, сои, рапса, кукурузы...
Вот список вроде уст. к МР сортов тыквенных/бахчи (в гугле есть переводчик):
http://extension.unh.edu/resources/repr ... Rep639.pdf
Вот другой список :
http://vegetablemdonline.ppath.cornell. ... stant.html
Вот текст оттуда с упомянание зимних сортов и т.д.:
PMR varieties evaluated previously exhibited a range in level of resistance that partly reflected whether the variety had resistance from one or both parents. There may also be minor genes for resistance accounting for some of the variation in reaction among PMR varieties. None of these varieties are immune to powdery mildew. With some, powdery mildew is suppressed early in its development, but by the end of the growing season these PMR varieties become as severely infected as varieties lacking genes for resistance. Thus PMR varieties need to be evaluated. Growers cannot assume they will all exhibit a similar level of suppression of powdery mildew. In another study, percent control achieved with PMR pumpkins relative to standard susceptible varieties ranged from 0% to 100% (eg no control to complete control)!
The 3 green acorn squash varieties evaluated in 2005 on Long Island exhibited similar, good resistance to powdery mildew. They were Royal Acorn PM (Harris Moran Seed Company), Sweet REBA (Cornell University Plant Breeding Program), and NH bush acorn (University of New Hampshire Plant Breeding Program). All three have a resistance gene from both parents. They were compared to Table Ace (Harris Moran), a standard acorn squash variety lacking known genes for resistance to powdery mildew. NH bush acorn produced significantly smaller fruit and less fruit by weight per plant than the others, but the fruit had substantially higher sucrose (aka sugar) levels. Fruit from the other varieties did not differ significantly in sucrose level. There were no significant differences among varieties in number of fruit per plant, width of fruit, or width of fruit cavity.
In a previous experiment conducted in 2002, excellent suppression of powdery mildew was achieved with the PMR green acorn variety Autumn Delight, which was not improved significantly by spraying it with fungicides; but its fruit had sucrose levels numerically lower (but not significantly lower) than other green acorn types. In that experiment Harlequin, green striped acorn, exhibited similar mildew suppression and its fruit had significantly higher sucrose levels than all the dark green acorns evaluated. Both Autumn Delight and Harlequin have genes for resistance from both parents. In another experiment conducted in 2002, Bugle, a butternut type, exhibited excellent suppression and high sucrose levels based on taste. These varieties provided better control of powdery mildew than that obtained with fungicides applied to standard susceptible varieties.
Tables at
http://vegetablemdonline.ppath.cornell. ... leList.htm include PMR winter squash varieties as well as varieties with resistance to other vegetable diseases. PMR squash varieties currently available include:
Butternut types:
Betternut 401 and Bugle
Green acorn squash types:
Autumn Delight, Royal Ace PM, Sweet REBA, Table Star, and Taybelle PM
Specialty types:
Bush Delicata – elongated green fruit with white stripes
Celebration - gold striped acorn
Harlequin – green striped acorn
An integrated program, consisting of a reduced fungicide program applied to a PMR variety, is recommended for managing powdery mildew in winter squash to ensure good control and to minimize chance of selection of pathogen races/strains able to overcome the genetic resistance in the plant or the action of fungicides. Fewer fungicide applications are needed with a PMR variety because powdery mildew often starts to develop later in PMR than susceptible varieties and the spray interval can be increased from 7 to 14 days without affecting control. Routine scouting is needed when growing PMR varieties not only to determine when powdery mildew has started to develop, and thus fungicide treatment is warranted, but also to detect other diseases. Some fungicides used for powdery mildew on susceptible varieties have broad-spectrum activity and thus will control additional diseases that may consequently not be detected when growing susceptible varieties.
Очень ценные таблицы по уст. овощей в том числе и холоду тут:
http://vegetablemdonline.ppath.cornell. ... leList.htm
Обратите внимание на то что у арбузов с уст. МР тяжко и сортов практически нет, с холодстойкостью тоже не очень. Проще сейчас вырастит дыню в том числе и китайского типа.
Вообще советую очень аккуратно относится к выбору сортов бахчи так как "тыковка вкусная французская" может у вас вообще не вырасти из-за плохой холодостойкости и никудышней уст. к болезням. Сейчас есть масса замечательных новых сортов/гибридов которые всякие устаревшие дважды обскачут.
И потом ищите достоверную информацию, а не одна открывшаяся фирмочка МММ вам всякий мусор-недоделки подсунет, по этой причине лучше выбирать сорта которые так же упомянаются в иностранной литературе (а лучше там и выведены, вспомните ту же стручковую фасоль.. ).