E**9
发帖数: 36 | 1 最近家里的草坪上突然出现了很多这种草，请教大家这是什么啊？需要除掉吗？谢谢！
是附件图片中开小花的那种草 |
E**9
发帖数: 36 | 2 更多图片
【在 E**9 的大作中提到】
: 最近家里的草坪上突然出现了很多这种草，请教大家这是什么啊？需要除掉吗？谢谢！
: 是附件图片中开小花的那种草
|
E**9
发帖数: 36 | 3
【在 E**9 的大作中提到】
: 最近家里的草坪上突然出现了很多这种草，请教大家这是什么啊？需要除掉吗？谢谢！
: 是附件图片中开小花的那种草
|
c**********a
发帖数: 237 | |
f*1
发帖数: 837 | 5 Search for 'poa annua' (i.e. 'annual bluegrass') and see if yours fit the
profile. |
a**u
发帖数: 1485 | 6 正常的草坪草吧。很多草坪种的混合草，而不是单一品种。
★ 发自iPhone App: ChineseWeb 8.6
【在 E**9 的大作中提到】
: 最近家里的草坪上突然出现了很多这种草，请教大家这是什么啊？需要除掉吗？谢谢！
: 是附件图片中开小花的那种草
|
r*******e
发帖数: 950 | 7 像是 Kentucky bluegrass的草种。 每年开春都由。 好东西哦。 俺们5区的。都让他
张一个月后在割草的。
【在 E**9 的大作中提到】
: 最近家里的草坪上突然出现了很多这种草，请教大家这是什么啊？需要除掉吗？谢谢！
: 是附件图片中开小花的那种草
|
E**9
发帖数: 36 | 8 谢谢回复！仔细看了一下，确实很像很像poa annua，应该就是了。
不知道为什么最近突然冒出来了？而且它跟草坪上别的草的形状不太一样，需要除掉吗？
开始还以为是crabgrass，刚去买了药准备杀一下呢。
我家草坪除了割草和浇水还没有做过别的，是不是还需要定时撒药防止杂草啊？
【在 f*1 的大作中提到】
: Search for 'poa annua' (i.e. 'annual bluegrass') and see if yours fit the
: profile.
|
E**9
发帖数: 36 | 9 好在哪里？觉得不是很好看啊，汗。。。
幸好决定除掉前来这里问了下，哈哈，现在就先留着吧
【在 r*******e 的大作中提到】
: 像是 Kentucky bluegrass的草种。 每年开春都由。 好东西哦。 俺们5区的。都让他
: 张一个月后在割草的。
|
f*1
发帖数: 837 | 10 你的是一年四季都长，还是春天长然后到夏天就黄了还是没了？Kentucky bluegrass是
perennial：如果没有被热死一般一年四季都会在那里。
【在 r*******e 的大作中提到】
: 像是 Kentucky bluegrass的草种。 每年开春都由。 好东西哦。 俺们5区的。都让他
: 张一个月后在割草的。
|
|
|
r*******e
发帖数: 950 | 11 俺家LD说。那长出来是草种子。 过一个月等他们掉了在割草。而且第一次割草不装袋
子。全部返回到草地上。2周后在收。 Kentucky bluegrass的根比其他的强大。买种
子每年俺LD都买2-300刀的。 一年好像洒2次。中间还要洒肥料吧。开春和上冬前。 嘻
嘻。再问问其他大牛。
【在 E**9 的大作中提到】
: 好在哪里？觉得不是很好看啊，汗。。。
: 幸好决定除掉前来这里问了下，哈哈，现在就先留着吧
|
r*******e
发帖数: 950 | 12 LD说俺家种的就是 Kentucky bluegras 啊。过一个月就没了。
【在 f*1 的大作中提到】
: 你的是一年四季都长，还是春天长然后到夏天就黄了还是没了？Kentucky bluegrass是
: perennial：如果没有被热死一般一年四季都会在那里。
|
f*1
发帖数: 837 | 13 There must be a mis-communication between you and your LD, because this
doesn't make sense.
If done correctly, Kentucky Bluegrass (KBG) only need to be planted from
seeds once, and they should be there for many years to come. You don't
overseed small bare patches every year precisely because of the strong root
system you mentioned: KBG has this nice self-patching mechanism by spreading
the rhizomes.
It is also possible that your area isn't fit for KBG because it will die off
in extreme heat of summer. That's probably why you need to keep
overseeding it every year, but that doesn't sound economical. If this is
really the case, you may want to plant some warm season grass.
KBG seedhead needs a few months on the stem before being viable. If cut off
before that time, it won't grow new grass the next year. Actually if you
see seeds early on and they drop pretty soon, it is very likely they are Poa
Annua, which seeds are viable much sooner. If this is indeed the case,
your practice is actually encouraging more Poa Annua weeds for the next year.
Read this to distinguish between KBG and Poa Annua:
http://www.agry.purdue.edu/turf/tips/2005/poa512.htm
【在 r*******e 的大作中提到】
: 俺家LD说。那长出来是草种子。 过一个月等他们掉了在割草。而且第一次割草不装袋
: 子。全部返回到草地上。2周后在收。 Kentucky bluegrass的根比其他的强大。买种
: 子每年俺LD都买2-300刀的。 一年好像洒2次。中间还要洒肥料吧。开春和上冬前。 嘻
: 嘻。再问问其他大牛。
|
r*******e
发帖数: 950 | 14 Thanks for the info. I will let my LD knows. Our neighbors and him doing the
same thing every year. But anyway I will tell him.
root
spreading
off
【在 f*1 的大作中提到】
: There must be a mis-communication between you and your LD, because this
: doesn't make sense.
: If done correctly, Kentucky Bluegrass (KBG) only need to be planted from
: seeds once, and they should be there for many years to come. You don't
: overseed small bare patches every year precisely because of the strong root
: system you mentioned: KBG has this nice self-patching mechanism by spreading
: the rhizomes.
: It is also possible that your area isn't fit for KBG because it will die off
: in extreme heat of summer. That's probably why you need to keep
: overseeding it every year, but that doesn't sound economical. If this is
|
E**9
发帖数: 36 | 15 大牛！
也就是说poa annua是weed，应该除掉的？
root
spreading
off
【在 f*1 的大作中提到】
: There must be a mis-communication between you and your LD, because this
: doesn't make sense.
: If done correctly, Kentucky Bluegrass (KBG) only need to be planted from
: seeds once, and they should be there for many years to come. You don't
: overseed small bare patches every year precisely because of the strong root
: system you mentioned: KBG has this nice self-patching mechanism by spreading
: the rhizomes.
: It is also possible that your area isn't fit for KBG because it will die off
: in extreme heat of summer. That's probably why you need to keep
: overseeding it every year, but that doesn't sound economical. If this is
|
E**9
发帖数: 36 | 16 查了下，果然是杂草，得想办法除掉了T_T
Poa Annua, or Annual Bluegrass
Poa annua is as common a lawn weed as they come. It looks a little like
Kentucky bluegrass, except it has a lighter shade of green, shallower roots,
and less drought resistance. It dies off when the weather gets hot, leaving
big empty patches in your lawn. Keep it out by spreading a crabgrass
preventer in late summer, before seeds can sprout in the fall. |
f*1
发帖数: 837 | 17 That's definitely not crabgrass. You should check the ligule. If it is
pointed and silvery, and the tip of the grass blade is boat/canoe head
shaped, then it is Poa Annua.
Poa Annua is mostly a winter annual in that it germinates and grows in the
fall (you probably didn't notice them then), and matures and seeds in the
spring, then dies off in the summer. People consider them weeds because
their color is lighter and when they die they leave an unsightly patch.
The best defense against weeds is to have a healthy and dense lawn with good
grass such that weeds won't be able to compete. Before getting to that
stage, you do need to use hand pulling and/or chemicals.
Poa Annua management isn't easy. I think it is in one of two weed families
that should send chills down people's spines: one is "Poa whatever" and the
other is "Bermuda whatever".
I suggest you search 'Poa Annua management' on the web to see what needs to
be done after you have confirmed what you have is indeed Poa Annua. When
you decide to use chemicals, make sure the chemicals won't harm your
existing good grass (i.e. read the labels carefully first).
吗？
【在 E**9 的大作中提到】
: 谢谢回复！仔细看了一下，确实很像很像poa annua，应该就是了。
: 不知道为什么最近突然冒出来了？而且它跟草坪上别的草的形状不太一样，需要除掉吗？
: 开始还以为是crabgrass，刚去买了药准备杀一下呢。
: 我家草坪除了割草和浇水还没有做过别的，是不是还需要定时撒药防止杂草啊？
|
S*A
发帖数: 7142 | 18 同意 fs1, 这个 100% 是 POA 啦，这个是 KBG 草坪
比较恶毒的杂草，但是还不是最恶毒的。 POT 比这个
恶毒而且难除掉。 |
S*A
发帖数: 7142 | 19 BTW，没有选择性杀死 POA 不伤 KBG 的然后又适合
大众使用的药。Crab grass 有。
所以 Poa 是要比 Crab grass 专业一点的杂草。
Weed & Feed 不杀 Poa。 |
