Follow these best management practices to maximize your weed control results.
Marengo® preemergence herbicide is one of the most cost-effective ways to control weeds. It offers up to 8 months of selective, preemergence weed control. Any preemergence herbicide should be used cautiously, and per label instructions, especially inside structures such as greenhouses. Here are some tips to help maximize weed control and minimize potential issues with applying Marengo inside greenhouses.
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// Marengo herbicide is labeled for use inside greenhouses, areas covered by landscape fabric, hoophouses, lathhouses and shadehouses to provide bareground weed control beneath benches and potted plants where weeds may germinate.
// For optimum results, apply Marengo before weed seeds germinate. When weeds are already present, add a postemergence herbicide specified by the label.
// Avoid treating impervious surfaces, such as concrete floors. If applicators are targeting cracks or crevices where weeds are likely to grow from impervious surfaces, apply directly to the crack or crevice.
// Do not allow Marengo to puddle or pool, especially where potted plants will be placed.
// When using Marengo to treat floors beneath and around benches, do not allow spray to contact foliage of desirable plants. If the spray contacts the foliage, wash off immediately.
//After treatment within a greenhouse, activate Marengo by watering in with light irrigation prior to weed germination.
// Growers are recommended to wait until Marengo treated areas have been watered in and allowed to completely dry before plants are placed in direct contact with an area treated with Marengo.
// If fans are present, turn them off during application.
Marengo is labeled for use under greenhouse benches.