2006-09-16 03:32:33 · 13 answers · asked by bob c 1 in Home & Garden ➔ Garden & Landscape
There is a disease that grapes get (I can't think of the name) that causes the fruit to shrivel and get discolored--almost like they are turning into raisins. The control is Captan. This chemical has been around since the Pilgrims but it works and is safe for use on fruit trees and grapes.
If it is this disease sanitation is important so when the leaves fall make sure you gather them all up and send them to a landfill with your trash. If you leave them around the grapes spores on the leaves will splash up on the plants next spring and you'll have the disease again.
Your local lawn & garden center should have Captan. Just follow the directions on the container and you should be back in business next year.
2006-09-16 03:53:37 · answer #1 · answered by college kid 6 · 1⤊ 0⤋
When the grapes are shriveled and the leaves show whitish spots underneath and sort of bubbles ,where the fungus is, on the surface,
the disease is called Peronospora.From mid May on to the end of June spray (or use a long haired brush to splash on) every 14 days with a Hydrated Lime and Copper mixture.
Hydrated Lime 2 parts/ 2 tsp per liter
copper 1 part/ 1 tsp per liter
2006-09-16 11:29:54 · answer #2 · answered by hildegard r 4 · 1⤊ 0⤋
Did you have a dry summer or did you fertilize this year? Did you see insects or fungus? If you had alot of rain and not enough sun that could of been the problem. Next year buy your fertilizer with a higher middle number, like 10-12- 10, just make sure the number in the middle is higher than the other two. Hope you have billions of grapes next year!
2006-09-24 07:13:46 · answer #3 · answered by watergoddess53 4 · 0⤊ 0⤋
Grapes are very sensitive to weather conditions. Too much sun, not enough sun, too much rain, not enough rain, rain at the wrong time, etc. etc. It could even be that it rained during the time that they were blossoming and the bees didn't get the job done. Like many other fruit, they could be an alternate year crop: good production one year followed by poor production the next. Better luck next year!
2006-09-16 12:06:42 · answer #4 · answered by keepsondancing 5 · 1⤊ 0⤋
It is hard to diagnose with such a brief desription but it sounds like it could be fungal in origin. The black-rot fungus (Guignardia bidwellii) turns the fruits hard, dark and shriveled. It can be a problem in warm, damp conditions. Good air circulation and resistant varieties are a good hedge against it. There again, I cannot tell you without seeing. My advice to you is to seek out a Master Gardener from your local Cooperative Extension office. They are the best source of advice for your local concerns. Good luck with your grapes.
2006-09-16 20:40:48 · answer #5 · answered by ? 3 · 1⤊ 0⤋
Grapes only produce on NEW Growth. Were the vines pruned after they quit bearing last year, if not that is where the problem lies.......Prune those vines!
2006-09-23 15:22:31 · answer #6 · answered by champ_ferguson_martyr 1 · 1⤊ 0⤋
we had the same problem here!
my poor daughter was devastated she was gonna take them to the county fair. last year she won a blue ribbon with our grapes,
This year the birds didn't even bother landing in the vines.
Grapes I'm told are either bi or tri growers which means your crop should be good next year or the year after.
stinks doesn't it!
2006-09-16 10:47:57 · answer #7 · answered by atticbat63 2 · 1⤊ 0⤋
The problem could be the amount of rain you have been getting in your area. I know we haven't gotten much rain and my vines are practically bare. Maybe next year!!!
2006-09-16 11:28:47 · answer #8 · answered by bugear001 6 · 1⤊ 0⤋
Last year if you had a ton of grapes, did you have to go to the bathroom a lot?
2006-09-16 10:38:18 · answer #9 · answered by Anonymous · 0⤊ 3⤋
sorry about the dork above me : o )
did it freeze at a different time? it could be one last freeze of the year way later than usual and can mess up the whole production of your fruit.
2006-09-16 10:40:47 · answer #10 · answered by liketoplay420 3 · 1⤊ 0⤋