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weed seed inhibitor

You can rid yourself of weeds the old fashioned way—pulling them by hand—if you’re vigilant. Wear a dedicated pair of gardening gloves for the task to avoid inadvertently transferring seeds elsewhere. Good gardening tools like a claw or sharp trowel can help you loosen the weed roots from the soil first. Pulling a weed completely out by the root is the only way to ensure it will not return.

Apply vinegar with a spray bottle, pump sprayer, or brush. Like other natural herbicides, vinegar cannot differentiate between weeds and other plants. Do this early in the morning, when there’s little wind, to avoid contaminating nearby plants. Vinegar’s killing properties are activated by the sun, so try this on a cloudless day, which also ensures that rain won’t wash it off before it works its magic.

With numerous kid-, pet- and earth-friendly ways to rid your garden of pesky weeds, here are nine stand-outs to put to the test.

Smother weeds and prevent new ones from growing by covering them with old newspapers. A thick layer of newspaper will keep sunlight from reaching weed seeds, so they can’t sprout. Wet the soil first, and then lay your newspaper down, wetting it thoroughly again before covering with mulch. This is a great way to recycle, and as a bonus, you’ll encourage earth worms to come and stay.

Did you know that corn gluten meal is birth control for seeds? Sprinkle it on your garden and it will keep weed seeds from germinating and growing into plants. Of course, corn gluten meal will keep any seed from germinating, so don’t try this on your vegetable garden until your plants are established and you’ve finished planting seeds.

Cover your planting areas with mulch and you’ll keep weed seeds from coming into contact with the soil in the first place. Mulch will also keep sunlight from reaching seeds that are already underground, so they won’t get a chance to sprout. Mulch offers the added benefits of retaining moisture and breaking down to enrich your soil. And it looks really pretty, too.

Résumé. A partir de semences, récoltées dans le sol, de treize espèces de mauvaises herbes, ont été préparés des extraits aqueux, dans le but d’éprouver leurs propriétés inhibitrices vis-à-vis de la germination, sur papier filtre, des graines de huit espèces de plantes cultivées. Tous les extraits ont retardé la germination de quelques espèces au moins de plantes cultivées. La germination de certaines espèces a été retardée quand les semences de plantes cultivées étaient entouréces, sur le papier filtre, par les semences de mauvaises herbes. Au laboratoire, les semences d’Abutilon theophrasti ont inhibé la germination de la tomate (Lycopersicum esculentum), aussi bien en sol stérile qu’en sol non stérile. L’inhibition se manifesta dans des conditions excluant toute compétition pour la lumière, l’eau et les éléments minéraux. Des études chimiques montrèrent que l’inhibition provoquée par les semences d’Abutilonétait due à des amino-acides libres provenant de ces semences.

Chemische Hemmung der Keimung von Kulturpflanzen durch Unkrautsamen und die Ursache der Hemmwirkung durch Abutilon theophrasti

Department of Horticulture, University of Wisconsin, Madison 5, Wisconsin, U.S.A.


Biochemistry Section, Weizmann Institute of Science, Rehovoth, Israel.

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Department of Horticulture, University of Wisconsin, Madison 5, Wisconsin, U.S.A.

Biochemistry Section, Weizmann Institute of Science, Rehovoth, Israel.

Another common problem is that corn gluten meal needs to be applied at a heavy rate of 20 pounds per 1,000 sq ft and most home spreaders can’t reach this level. If it is not applied thick enough, it won’t be effective.

There are two problems with this advice; different weed species germinate at different times and germination is affected by the environmental conditions, which change from year to year. So it is tricky to apply it at the right time. Apply too late and the nitrogen feeds the already germinated seed. Apply too early and it has limited effect.

Corn Gluten Meal – Does it Work?

Most discussions refer to weeds, but non-weed seeds like grass, perennials and vegetables are also affected.

Since this is a natural product everyone assumes it can be used without risk, but that is not quite true. Corn and corn by-products such as this are known to cause allergies in some people and this condition can be serious. If you or your family suffer from respiratory or hypersensitivity due to corn, avoid exposure to corn gluten meal.

Corn gluten meal will not alter the pH of the soil to any significant amount.