Odd light green grass sprouts
pfarrelli
7 years ago
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joe renalds
7 years agolast modified: 7 years agoUser
7 years agoRelated Discussions
Light green grassy weed
Comments (12)I'm currently battling a very similar weed after a complete lawn restoration in September 2013 so it looks like we could have the same problem. By the end of January it was completely weed free but I noticed these weeds popping up by mid February. The stuff I have is very easy to pull up after a rain when he soil is very moist and it doesn't appear to be spreading from the roots. I was thinking its crabgrass that germinated in the fall and sat dormant through the winter. Only problem with that theory is that we have had several heavy frosts and a couple snows which didn't kill them. I would have thought this would have killed crabgrass, right? The seed I used was the Hogan Tall Fescue blend from the Hogan company which clearly states on the label 0% weed and 0% other crop so I'm positive this weed didn't come from the seed. I did use straw I purchased from a local company so I'm thinking if this weed is orchard grass the straw is most likely where it came from. Some of these weeds in my lawn are just individual while there are others in small groups which to me indicates they were in the straw, some as complete seed heads while others were just individual seeds. Last weekend I put out an application of Prodiamine 65 WDG (Barricade) pre em in hopes it would keep more of this stuff from germinating but it doesn't say anything about controlling orchard grass. So far I have manually pulled about 50% of it but that's not much fun on 20,000 square feet of lawn with my beat up old knees! I did spot spray a week ago with Ortho Weed-B-Gon crabgrass killer which seems to be hurting it a little. Going to wait another week and do a second spot treatment and see what happens. Here's the photo of my weed for comparison: This post was edited by ForsheeMS on Sat, Mar 8, 14 at 9:42...See MoreLight green grass problem - Help!
Comments (36)Will Brought in an expert and he verified the triv plague. It has horizontal growth and when it gets tall, it falls over showing brown under-growth. Actually pretty in the early spring when its short (beware) It grew unbelievably fast and the expert said if I didn't act quickly and decidedly I would have to contact a golf course to use one of their greens mowers. So it was 2 rounds of Roundup at least 18" past the known edge of the triv. Used my power rake to pull up the dead turf. That was almost a mistake because the viney triv kept wrapping around the spindle. It worked out OK because I had a perfectly contoured base for replanting. I live by Michigan State University and they have a wealth of "Green" info. We prefer to use "Spartan Grade A". Its a Kentucky Blue mix with some drought resistant/ winter resistant strains. Works for us Yankees here. Good luck Mark...See MoreNew Leaves Always Having Odd Colors For Months Now
Comments (23)Nobody refered to aquatic life Henry, it really is not worthy of you to put statements out of context, even more to use a snippet of one's sentence just in order to pursue a pet subject. I was responding to the poster regularly using malathion and who is 'really apprehensive with using abemectin which I've heard is particularly dangerous to humans'. Do you disagree with my premise? One would be pushed to find a pesticide or herbicide not harmful to some form of aquatic life. Is malathion preferable in your most humble opinion in the context of this discussion? Abamectin containing pesticides, a byproduct of the fermentation of a naturally occuring soil bacterium, have been judged suitable for garden use in their labeled concentrations, by any number of government authorities worldwide due to comparatively limited (although far from non-existent if you eat the darn thing) potential for toxicity to mammals (human amongst them), and comparatively limited persistence on edibles. With organophosphates the situation is the reverse. What exactly is your point? That no pesticide use is preferable to any pesticide use from the point of view of harmful sideffects to nature in general? Thank you very much, that point is I think well taken by now by the majority of gardeners in the western world. When comparing toxicity levels linked to below, it is important to consider effective concentrations used in pesticide products containing these drastic ingredients. You are not spraying nor buying pure abamectin. An ingredient is labeled according to the weight of pure ingredient required for acute toxicity per unit of weight of test subject, not according to the actual potential for exposure. The latter is evaluated in risk assesments which result in a product being registered or rejected. This is important to keep in mind. Standard abamectin concentrates for spraying are 1.8% and these concentrates are further typically diluted to 1ml/lt (that is 1:1000) before spraying. Malathion concentrates are typically 50% or more afaik and these are diluted to about 1-2Tbsp / gallon (1Tbsp per gallon is about 4ml/lt) which results in orders of magnitude more concentration of malathion, if I'm not mistaken with my rough mental metric conversions, than abamectin when spraying. Extoxnet Abamectin Extoxnet Malathion Furthermore, abamectin is mainly absorbed if taken through the oral tract, something improbable if applied properly and if one does not want to commit suicide, while malathion is very readily absorbed through the skin, mucous membranes and lungs which makes take up much more probable in the case of the casual (i.e. careless) gardener use. On top of that, no teratogenicity or carcinogenicity has been reported, to my knowldege, for avermectins in contrast to organophosphates including malathion. To top these, the selectivity of abamectin is much higher than malathion which is considered a broad spectrum insectide. Exposure to high levels of avermectins have been shown to affect human male sperm. Btw, in terms of action, abamectin does not seem to be plant systemic in the proper sense of the word ( i.e. it is not translocated in significant concentrations through the whole plant as, for example, imidacloprid is). It does exhibit some local translaminar action (i.e. it can penetrate young leaf tissue). Hence, once dry it does provide some protection against sap sucking mites and some insects but seems to be fairly safe for bees and other pollinators. It is highly toxic to bees when still wet or when sprayed on blooms. In this respect it is similar to spinosad. Do not drink the contents of an abamectin pesticide bottle or any other pesticide for that matter......See MoreDoes poa triv always grow tall/sprout seed heads?
Comments (4)Only a fraction of poa triv actually seeds. Usually the mature stuff. Most of it doesn't. The stuff that doesn't seed can be very fine bladed. To me, the immature stuff is tougher to kill as you can't easily apply roundup to it. That said, I think the immature stuff *might* be controlled by Tenacity....See MoreUser
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