WaterDoc
New member
- Joined
- May 11, 2012
- Messages
- 4
- Location
- Alpine, TX; New Pine Creek, OR
- Tractor
- Ford 3000, 3550, 4000, 5000; New Holland 3415; Kubota M9000dtccs; JD 2440, 2840; International TD9
If you contact the plant expert at the Penn State Univ Ag Extension Office, that person should be able to give you an ID and a treatment for the pest. Here is the contact info: 702 Sawmill Road, Suite 102; Bloomsburg, PA 17815-7727; Phone: 800-851-9710; Fax: 570-784-5769; NorthumberlandEx@psu.edu; Office Hours: Monday-Friday 8:00 a.m. - 4:00 p.m.
Do any of these look like the weed you have in your pond?
Common Duckweed Lemna minor
Spirodela spp; Giant Duckweed
Hydrilla verticillata; Looks like Elodea
This link gets you to an article from Penn State on killing duckweed in ponds. http://extension.psu.edu/pubs/xh0014
If the herbicides you plan on using are regulated, you need to fill out the paperwork required by the commonwealth. It looks like the two best herbicides are regulated, Sonar (fluridone 41.7%) and Reward (diquat dibromide). DO NOT use Diuron granules for treating ponds or waterways unless the commonwealth approves it. That is an extra-label use and is illegal. Bigfoot62 is using it on soil which is ok. But if you use it to treat the pond and it runs off into Teresa Tree Huggers garden you could be in some serious trouble because the garden will look like it got hit by a West Texas drought. Diuron granules work excellent to treat weeds in soil.
If there are fish in the pond and the plants have grown aggressively, then the fish may die when you treat the pond with the herbicide. Oxygen levels are depleted as the dead plants decompose and the fish will suffocate. You may be able to prevent fish death by aeration of the pond before, during and after treatment, just like you aerate an aquarium. This also will help prevent future growth of the duckweed if you continue to aerate the pond.
Follow label directions on whichever herbicide you use. You should wear a respirator for organic vapors, eye protection (minimum of safety glasses, better to use goggles without vents) and gloves. I personally wear a full-face respirator, hat and gloves, old pants and long sleeve shirt, then throw the pants and shirt away if they get really wet with herbicide otherwise I simply wash them twice in strong laundry detergent. Then I take a good long shower. Good Luck.
Do any of these look like the weed you have in your pond?
Common Duckweed Lemna minor
Spirodela spp; Giant Duckweed
Hydrilla verticillata; Looks like Elodea
This link gets you to an article from Penn State on killing duckweed in ponds. http://extension.psu.edu/pubs/xh0014
If the herbicides you plan on using are regulated, you need to fill out the paperwork required by the commonwealth. It looks like the two best herbicides are regulated, Sonar (fluridone 41.7%) and Reward (diquat dibromide). DO NOT use Diuron granules for treating ponds or waterways unless the commonwealth approves it. That is an extra-label use and is illegal. Bigfoot62 is using it on soil which is ok. But if you use it to treat the pond and it runs off into Teresa Tree Huggers garden you could be in some serious trouble because the garden will look like it got hit by a West Texas drought. Diuron granules work excellent to treat weeds in soil.
If there are fish in the pond and the plants have grown aggressively, then the fish may die when you treat the pond with the herbicide. Oxygen levels are depleted as the dead plants decompose and the fish will suffocate. You may be able to prevent fish death by aeration of the pond before, during and after treatment, just like you aerate an aquarium. This also will help prevent future growth of the duckweed if you continue to aerate the pond.
Follow label directions on whichever herbicide you use. You should wear a respirator for organic vapors, eye protection (minimum of safety glasses, better to use goggles without vents) and gloves. I personally wear a full-face respirator, hat and gloves, old pants and long sleeve shirt, then throw the pants and shirt away if they get really wet with herbicide otherwise I simply wash them twice in strong laundry detergent. Then I take a good long shower. Good Luck.
