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Post by Drahkk on Jun 2, 2013 12:34:08 GMT -5
Noticed this on my Jersey Golden Acorn today:   I've never seen ZYMV before. Can anyone confirm or deny that's what this is? If not, what might it be? So far it's just on one leaf per plant, but every plant has one leaf like that. Should I pull them now, or wait and see what happens? MB |
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Post by ferdzy on Jun 2, 2013 13:25:01 GMT -5
Yeppers. Sorry. Pull.  |
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Post by oxbowfarm on Jun 2, 2013 14:22:37 GMT -5
NO!! That's seed you got from me right? That's normal for JGA, that's not a virus that's genetic, its just a secondary expression of precocious yellow. Trust me, it will be fine.
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Post by Drahkk on Jun 2, 2013 15:12:36 GMT -5
Yes, that's your seed Ox. Thanks for catching me before I made a mistake. I hoped it might be something benign like that since every plant seems to be showing it to the same extent, but couldn't be sure.
MB
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Post by Drahkk on Jun 2, 2013 18:57:25 GMT -5
I didn't know the precocious yellow gene caused that. I thought it just made the immature fruits and their attached stems bright yellow, and overrode any green genetics so the mature fruit would be full yellow regardless of how the immature looked. This summer pepo for example:  The mother was a yellow squash that I was pretty sure had the precocious yellow gene, and the father was a standard green zuke. I realize the stems are green, but on the mother they were yellow, all the way to the vine. As they mature the green fades on the ends of the squash and they end up full yellow again, but they don't show that leaf mottling like JGA does. Neither did the mother. I've actually never seen that particular effect before; glad to know it's something to watch for. MB |
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Post by ferdzy on Jun 2, 2013 19:37:57 GMT -5
Okay... I'm embarrassed. But it sure looked like yellow mosaic to me.
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Post by Drahkk on Jun 2, 2013 19:53:33 GMT -5
Okay... I'm embarrassed. But it sure looked like yellow mosaic to me. No worries, Ferdzy. Thanks for answering! Experienced opinions are what I was looking for. Since it was Ox's seed, though, I'm deferring to the voice of the patriarch.... MB |
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Post by oxbowfarm on Jun 2, 2013 21:34:36 GMT -5
Now that you mention it, I've never seen that kind of mosaic-ey spotting on any of the modern precocious yellow summer squash hybrids either. But supposedly Oved Shifriss' breeding material wasn't ever used after JGA. They just used the same breeding technique but went back to the gourds to recapture the gene instead of breeding directly from his material. Maybe Oved picked up a couple of other gene linkages that got missed when they re-did the work.
I do know that all my JGA show that on the first couple of true leaves and then it goes away. They don't show any other of the characteristic symptoms of ZYMV.
I'm pretty sure I've mentioned this before, but my JGA is definitely not guaranteed pure. The sample I got from GRIN was hopelessly crossed up and I preserved seed only from the most JGA-like fruited plants, but its impossible to say if they are the true McCoy or just JGA grandkids.
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Post by Drahkk on Jun 2, 2013 21:55:35 GMT -5
No problem. First, I've never grown it before and wouldn't know the difference anyway. Second, since it's pretty much nonexistent anywhere else, we might as well claim it as pure; it's the purest that can be found regardless. We shall see how this generation looks and tastes. It's the only pepo I've got planted within a couple hundred yards, so it will remain however pure it was when you sent it to me. As long as it looks like it is supposed to and tastes reasonably good I'm going to keep calling it JGA.
MB
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Post by steev on Jun 2, 2013 23:56:51 GMT -5
IF it were YMV, does one have to assume that the whole plant is riddled, but it's only expressed in new growth, so that one can't cut off the marked leaves, even with bleached clippers?
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Post by Drahkk on Jun 24, 2013 19:09:29 GMT -5
Steev - I'm not sure, having never dealt with ZYMV. That's why I was asking. To be honest, that exact treatment had crossed my mind at the time. Glad it wasn't that, though. Ox - I'm really going to show my inexperience on this one, but... with space limited by raised beds, the only winter squash I've grown before were some small pumpkins and butternut that I trellised one year. With those it's easy to know when they're ready, and it's never this early. But with the JGA I'm not sure. I have several that seem mature, in that their skin has lost its gloss and darkened slightly, and they seem quite solid. What do you think?  And don't worry about the chaonephora fungus in that pic. It eventually finds every squash I plant, every year. Mulching and keeping watering to a minimum keeps it from doing too much damage. It seems to only affect spent male blossoms on JGA, but I cleared all affected tissue out after taking the shot just in case. MB |
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Post by oxbowfarm on Jun 24, 2013 19:41:32 GMT -5
I'd say they could stay on the plant longer and gain a bit from it. What condition are the leaves in? Around here the race with winter squash is to see if they can mature to good quality before the foliage goes down to powdery mildew. The longer they foliage lasts the better the squash are in terms of flavor. But you may have bugs or other pests that might attack the squash? JGA seemed to get a bit orangey when they were really ripe, hard to tell from an online image.
Its a little amazing that you have maturing squash on your JGA and mine are in the second leaf stage.
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Post by Drahkk on Jun 24, 2013 20:58:39 GMT -5
The oldest ones are a bit darker, but I wouldn't call them orange. Not even gold; just a shade or two darker yellow than the young ones. I'll leave them a while longer.
Thankfully I've never had to deal with PM here. That chaonephora fruit rot fungus can attack soft young fruit, but as long as moisture is kept under control it only tags wilting flowers. My worst enemies are usually squash bugs and cucumber beetles. Both have been strangely absent so far this year. Not sure why, but I'm not complaining. They are the reason I wanted to let a few mature for seed before trying any at the summer squash stage, though.
So far they look as healthy as can be. A little crowded since I planted extra and then never thinned, but it doesn't seem to be bothering them too much.
MB
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Post by steev on Jun 24, 2013 21:36:12 GMT -5
Always strangely discomfiting when the expected pests don't show up; one wonders whether they're staying away because something worse is coming.
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Post by ferdzy on Jun 25, 2013 6:52:01 GMT -5
Hey, Drahkk! We have your bugs. Where would you like us to ship them? Can spare a little powdery mildew too.
Seriously, squash envy. Things are looking much more hopeful than last year when our total squash harvest, incuding zucchini, out of about 42 plants, was approximately 6 wizened zucchini. However, we are out every morning picking cuke beetles, cuke beetles, asparagus beetles and more cuke beetles. Got a few squash bugs early in the season but haven't seen any since. It's probably time to water heavily and take a second look though. Amazing to see squash that size already - ours are just flowering.
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