From

Location

Message

Date Posted

Saegertown Pa.

I'm looking for something to control Pseudomonas which is a leaf spot. I have tried Kocide 2000 and it doesn't seem to be slowing it down was wondering if any one has used Phyton 27 before. Quinn

7/29/2004 11:56:55 AM

Appalachian Mtns.

Isn't that a weaker concentration of copper than Kocide?

7/29/2004 2:45:09 PM

Utah

Quinn-
I don't know about Phyton 27... but found this on Leaf Spot. It says copper slows it's spreading. I wish i could be of more help.
gordon

-Angular Leaf Spot-
Angular leaf spot, caused by the bacterium Pseudomonas syringae pv. lachrymans.
This bacterial disease can occur on most cucurbits, including cucumber, muskmelon, pumpkin, and winter squash. The disease is less common on cucumber because resistant varieties are widely grown. Leaf spots are variable in size and may be angular in shape because leaf veins limit enlargement of spots. Initial symptoms appear as brown water-soaked spots, as illustrated on butternut squash (fig. 1). Under moist conditions, especially in early morning, small droplets of bacterial ooze can come from the water-soaked areas; which, when dry, appear as a white residue. The initial brown spots may be surrounded by a yellow halo, become white, and, as they dry, tear away from the healthy tissue, producing irregular holes in the affected leaves. Fruit spots are smaller than leaf spots and are usually circular (fig. 2). These spots, as shown on the processing squash Delicious, are usually superficial but can develop into deeper rots if secondary soft-rot bacteria invade.

7/29/2004 3:02:53 PM

Utah

The bacteria can survive for possibly 2 years in soil or debris from diseased plants. It is also known to be associated with seed. Bacteria can enter through wounds or stomates. Moisture in the form of rainfall or relative humidity greater than 95 percent for several days is required for infection and later disease development. Dry weather for 2 weeks can arrest the disease. Controls include the selection of resistant cucumber varieties, use of disease-free seed, and a 2year rotation out of all cucurbits. Check with your seed supplier for the current list of resistant cucumbers. Copper fungicides can be applied to slow disease spread during particularly wet periods but can be dropped if dry weather continues for 2 weeks.

Ref:
http://vegetablemdonline.ppath.cornell.edu/PhotoPages/Cucurbit/Foliar/FoliarFS1.htm

7/29/2004 3:03:00 PM

Ctpumpkin@optonline.net

Phyton 27 is Copper Sulphate Pentahydrate.....21.36%

Here is a link to an entire website about it:

http://www.phyton27.com/

There are 5 different formulations of Kocide & like Nu-Cop 50, they are all Copper Hydroxide based.

I'm not sure about the various Kocides, but Nu-Cop 50 is labeled for Pumpkins.

Phyton-27, though used by some growers is NOT labeled for use on Pumpkins.

Let me do some more snooping.

Quinn, I know that the New Hampshire guys use Phyton 27.

7/29/2004 5:26:02 PM