![]() Penn State Extension runs a workshop to help you learn about the impact of invasive plants and control measures using herbicides. The publication Invasive Forest Plants of the Mid-Atlantic is a full-color publication with descriptions of 25 of the most common invasive plants in Pennsylvania. ![]() There is lots of information available to help you identify invasive species. They include burning bush, privet, Japanese barberry, and the butterfly bush. In the home garden, there are certain invasive shrubs you should avoid. Managing invasive plants such as the tree-of-heaven, multiflora rose, and pigweed is therefore essential. They can adversely affect biodiversity, cause the ecosystem’s instability, decrease land productivity, poison livestock, reduce wildlife habitat quality, diminish aesthetic value, and affect human health. The United States is under constant threat of invasive species. We consider a plant species to be “invasive” if it has moved into a habitat and reproduced so aggressively that it displaces some of the original plant species. Organic producers can use many of the same weed management techniques as those used in conventional systems, but the focus is more on nonchemical control strategies. Managing weeds in conservation tillage systems requires a planned approach. The methods of weed management and control a producer chooses will depend on the type of production system they use. It’s essential to monitor and control annual weeds after silage harvest, but it depends on the weeds that you are targeting, as not all annuals set seed at the same time. If left until the following year, weed control will be more challenging. Biennial and perennial weed control are most effective in the fall, before they overwinter. Timing is also vital for successful weed management and control. Food crops and forage weed management starts with identification. The initial focus of weed management and control should be on cultural practices before chemical weed control. You can, however, control them through an integrated weed management approach. Managing weeds is one of the biggest challenges for producers of agronomic crops, forage crops, fruits, and vegetables. Some weeds are unpalatable to livestock, or in some cases, poisonous. Weeds in field crops also lower the quality, increase the risk of disease and insect problems, create harvesting problems, and cause premature stand loss. Weeds in field crops and forages can reduce yields by competing for water, sunlight, and nutrients. Control starts with the creation of the seedbed. You can obtain satisfactory control of summer annual grass weeds by both cultural and chemical methods as long as you consider the plant’s life cycle. One particular moss species, Bryum argenteum, is becoming a common weed on Pennsylvania golf courses.Īnnual grasses such as crabgrass and goosegrass can also be an issue in many Pennsylvania lawns. It tends to grow where turfgrasses are thin and weak. One of the most common weeds that occurs in home lawns is moss. They also affect the aesthetics of turfgrass and its uniformity. Weeds are not welcome in a lawn because they compete with desirable grass species for moisture, light, and nutrients. It could be because the soil is compacted, poor soil conditions, improper mowing practices, frequent, shallow watering, or not fertilizing correctly. Weeds can appear in a lawn for a number of reasons. Understanding weed ecology, biology, and identification will help you design a management system to minimize their impact. Some weed species can look very similar at certain growth stages, yet have entirely different life cycles, modes of reproduction, effects on crops, and responses to control tactics. Whatever definition you choose, correctly identifying major weeds can be a crucial first step toward effective weed control. An alternative clarification is that they are plants whose undesirable qualities outweigh their good. Many people consider it to be any plant that grows where you don’t want it. You’ll also find tips on using various herbicides and integrated pest management. On this page, you’ll find information on weed identification and control, including catsear, marestail, purple loosestrife, pokeweed, pigweed, poison ivy, crabgrass, hemlock, purslane, and multiflora rose. They compete with other plants for nutrients, water, and light, as well as harbor diseases and pests. ![]() A weed can be any plant growing where you don’t want it to.
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