Big weed control news. I was recently doing an organic presentation for the OHBA group in Houston and of course organic wee control was a popular topic. Mike Serant with the Microlife products gave us a sensational tip. I brought up the Agralawn Crabgrass Killer as a good tool for crabgrass, clover and chickweed control, but Mike gage us a better tip.
The AG Crabgrass product kills Virginia Button weed in turf. He also said it works on false strawberry, another serious weed problem. I’ve already tried that and it works!
Botanical Name: (Diodia virginiana)
Flowers are white and tubular with four lobes at each axil along the stem.
Natural Habitat: A spreading perennial weed with opposite leaves that often have a yellowish mottling due to the presence of a virus that grows in close association with this weed. Virginia buttonweed seems to proliferate in moist or wet areas, tolerates close mowing and is a very troublesome weed of lawns and turfgrass and is found from New Jersey west to Missouri and south into the Gulf Coast states.
Identification: Spreading perennial herb / weed with hairy, branched stems. Leaves: Opposite, elliptic to lance-shaped, without petioles (sessile), and approximately 1 to 2 inches long by to 1 inch wide. Foliage: Leaves often have a yellow mottling due to the presence of a virus and the leaves are joined across the stem by a membrane that has 1 to 3 stipules that resemble long bristly hairs. Flowers: Occur in the position between the leaf and the stem (leaf axils). Individual flowers are star-shaped with four white petals and are approximately 3 inches wide and ¾ inch long. Fruit: A small, hairy capsule that contains 2 seeds. Roots: Flesh roots allow vegetative reproduction to occur.
Seedling: Cotyledons are thick and oblong, dark green on the upper surface and lighter green below. First true leaves are elliptic to lance-shaped, without petioles (sessile), and are joined across the stem by a membrane that has 1 to 3 stipules that resemble long bristly hairs.
Photos from Virginia Tech