Return to the Fruit & Orchards Forum | Post a Follow-Up

 o
Spray recommendation for grape problems?

Posted by mdo003 (My Page) on
Tue, Jul 22, 14 at 17:16

I have a Mars grape vine and have never sprayed them or had problems with disease the past couple years, but this year has been rainy and humid and most of my clusters have at least a couple grapes infected some are mostly ruined. I removed some of the worst clusters and have been trying to pick off infected grapes, and have been spraying them with 1% neem oil, not sure if its helping. I think it is botrytis but im not completely sure, attached a pic. Anyone have any good recommendations for a spray that comes with a hand squeeze? Most were bulk for sprayers. Only one I saw at the garden center near my house today was Daconil, it didn't say anything about botryitis on the bottle so I didn't want to spend $10 if it wasn't going to work.


Follow-Up Postings:

 o
RE: Spray recommendation for grape problems?

I though this was 'black rot'. My grapes look like this even when I spray although I'm going to have to rethink my approach. I'm not sure where you live but the link below is the resource I have used to research fruit spray schedules (including grapes).

Here is a link that might be useful: Midwest Small Fruit and Grape Spray Guide


 o
RE: Spray recommendation for grape problems?

now that i looked at more pics i think youre right on the black rot thanks


 o
RE: Spray recommendation for grape problems?

I used to get control of that and all other important fungal issues with grapes with Immunox as a single spray about 10-14 days after last apples lose petals of flowers. I now have a variety where that timing or number doesn't work and I intend to follow up with one more spray next year 10-14 days later still. Or I might try just that subsequent spray to find out if it was only a matter of timing for this variety.

I liked the previous timing because I'm spraying then anyway. I'm confident that Funginex (myclobutanil) is your best bet as a compound to control bunch rot (or whatever rot) although I think it can also be done with the more persistent application of sulfur. It is a crop that is grown organically in the northeast by some commercial growers.

The infection begins when the berries are very tiny. As they get larger the skin gets tougher and more resistant.

Immunox can also rescue an infected crop, but can't erase the black spots.


 o
RE: Spray recommendation for grape problems?

I picked up some Immunox and sprayed my remaining grapes with the hope that I can save some. While I was at it, I sprayed my 4 gooseberry plants that had been nearly defoliated by a fungus and several trailing blackberries that had leaf spot. It's been a tough year for fungus on plants.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Fruit & Orchards Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here