x**********g 发帖数: 381 | 1 今年我们这儿冬天雨水很少,是不是就不需要给桃树喷药防卷叶病了? |
L****A 发帖数: 12692 | |
x**********g 发帖数: 381 | 3 不是说雨水多容易有fungi,然后桃树容易有卷叶病吗?我理解错误?
【在 L****A 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 这是啥逻辑?
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a****a 发帖数: 26187 | |
l*******l 发帖数: 13923 | 5 等果神/仙来哦
【在 x**********g 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 今年我们这儿冬天雨水很少,是不是就不需要给桃树喷药防卷叶病了?
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x**********g 发帖数: 381 | 6 顶一下
【在 l*******l 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 等果神/仙来哦
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u***l 发帖数: 2997 | 7 建议你还是喷。湿度大的时候霉菌容易传播,雨水少不说明湿度低,比如晚上如果露水
重或者有雾,湿度一样非常大。不知道你住哪儿,如果是桃树卷叶病高发的地方,不喷
几乎一定会发病;即使喷了,春天开花时如果雨水多,也不能保证就不发病。湾区今年
雨水很少,不过俺还是喷了铜,不能有侥幸心理。春天马上到了,再等一等花苞开始涨
大,喷药就来不及了。
【在 x**********g 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 今年我们这儿冬天雨水很少,是不是就不需要给桃树喷药防卷叶病了?
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x**********g 发帖数: 381 | 8 这个铜喷剂哪里有卖的?能不能给个link是啥样的?我在南湾
【在 u***l 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 建议你还是喷。湿度大的时候霉菌容易传播,雨水少不说明湿度低,比如晚上如果露水 : 重或者有雾,湿度一样非常大。不知道你住哪儿,如果是桃树卷叶病高发的地方,不喷 : 几乎一定会发病;即使喷了,春天开花时如果雨水多,也不能保证就不发病。湾区今年 : 雨水很少,不过俺还是喷了铜,不能有侥幸心理。春天马上到了,再等一等花苞开始涨 : 大,喷药就来不及了。
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u***l 发帖数: 2997 | 9 目前加州市场上唯一能买到的是Liqui-Cop,喷桃树建议用说明书用量的三到四倍。HD
和Lowes都没有,OSH有,1 quart装,$19.99。建议你去Local Nurseries找找看,俺买
的$16.99,有半夸脱装的$10.99。要和Spray Oil混合喷,一月底二月初开花前这次最
重要。喷后几天最好不要下雨。
【在 x**********g 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 这个铜喷剂哪里有卖的?能不能给个link是啥样的?我在南湾
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l******f 发帖数: 418 | 10 这家Yamagami's Nursery, 它的东西确实贵, 但它的Newsletter 挺不错的, 最近的
一期谈到了果树防病。他们建议在一,二月各喷一次。
http://ynurserynews.com/news/12/04/
Dormant Sprays--A Spray in Time Saves Nine!
Powdery mildew, peach leaf curl, aphids and other pests are lurking on the
bare wood of dormant roses and fruit trees just waiting to attack tender new
growth as it emerges in spring. Now is when those pests are most vulnerable
and accessible to spraying.
Dormant sprays are a one-two punch of Monterey Liqui-Cop to control a range
of fungal problems and Worry-Free Pesticidal Oil (canola oil based) to
conquer over-wintering insects.
For fruit trees, apply them both in January, first the Liqui-Cop, then when
it is dry, the Worry-Free Pesticidal Oil. Re-apply the Liqui-Cop in February
as flower buds swell and just begin to crack open.
This last spraying is especially important when battling peach leaf curl. It
will help if you prune and remove any "mummies" (dried fruit from the
previous season) before spraying.
For roses, pruning before spraying is important. Additionally, you should
remove any foliage that is still hanging on as it looks bad and will deflect
the spray. Again, you want to apply the Liqui-Cop first, then when it is
dry, the Worry-Free Pesticidal Oil.
Dormant sprays are more effective as preventatives than repeated growing
season sprays are as curatives.
Apply a dormant spray when we have a 48-hour window of dry weather
anticipated, as a hard rain will wash it off and you will need to spray
again. For more information about fruit trees, pick up a copy of our Fruit
Tree Care Calendar. |