Now is the time to look for Japanese beetle injury to see if action is needed to protect your plants.
Archives for June 2018
Gypsy moth has many homeowners scrambling to deal with large caterpillars stripping leaves from their trees. Don’t panic! We explain how to manage it.
People often select plants first for their beauty and second for their functionality in the garden. Frequently, we don’t know or don’t consider a plant’s behavior when we’re selecting them. Almost by definition, a species that is an effective ground cover will have a spreading habit. But does that make the species aggressive or invasive? There can be much confusion about the meaning of the terms aggressive and invasive. Some plants, given their optimal habitat, can become quite prolific in the garden. A plant can be considered aggressive if it spreads and has the potential to take over a garden area. However, some planting sites may call for an aggressive habit. A spreading plant can be considered invasive if it can also escape the garden setting and move into natural areas (prairies, wetlands, and so on) and displace native vegetation. Truly invasive plants have the potential to dominate natural vegetation.[Read More…]
Scale insects are difficult to manage because their waxy or sticky covering protects them from insecticides. Learning about their life cycle can help you protect your plants.
This article, and many others, will be presented at the 2018 Purdue Turf and Landscape Field Day on July 10th. Registration is open and available online: https://www.mrtf.org/event/turf-and-landscape-field-day/?event_date=2018-07-10 Here is the lineup for the field day. A cultural weed control method is one that involves steps to reduce or eliminate weeds via maintenance techniques. In landscapes, the most common type of cultural control is mulching. Mulching provides many benefits in the landscape, including moisture retention, temperature consistency of the root zone, improvement of soil structure, addition of organic matter, aesthetics, and, perhaps most important, a significant reduction in weeds. Mulch prevents weeds a couple of different ways. Many weed species require sunlight for germination to occur. By shading the soil beneath the mulch, weed seeds that require sunlight will not begin to germinate. The other way that mulch prevents weeds from germinating is by providing large air spaces (macropores) between the pieces[Read More…]
As we move into summer it is time to be on the lookout for Japanese beetles. They are already being reported by Indiana Nursery Inspectors in Southern Indiana. Continued warm weather and precipitation should bring them out throughout the rest of the state over the next few weeks. See our bulletin Japanese Beetles in the Urban Landscape for tips on controlling them without killing pollinators.
After surveying 72 sites across Indiana and Illinois in the coldest part of our states where bagworms are found, we determined that while many bagworms were killed, enough survived to keep bagworms near the top of our landscape problem list. NOW is the time to inspect your plants for bagworms. For details on the cold snap and how to control bagworms see this article in the February issue of the Purdue Landscape Report. https://www.purduelandscapereport.org//article/824/
Fungi are a unique group of organisms—so unique that they are put into a separate category called a ‘Kingdom’. In Kingdom Fungi, some members cause rust, scab, powdery mildew, leaf spots and blights (to name but a few!). When these fungi are ‘out of control’ many people turn to fungicides. What are fungicides and how do they work? We have a video that explains this: https://www.youtube.com/watch?v=eNiqROUtpgo Fungicides are used to stop fungi from attacking plants, not after you see the damage. Anyone who has grown roses knows how Japanese beetles damage plants. But do you know how powdery mildews infect and damage plants. Find out here: https://www.youtube.com/watch?v=eNiqROUtpgo Fungicides are best used as part of an integrated strategy that looks to improve how the plant looks or yields. Why use fungicides? Fungicides are used to protect plants when integrated management can’t do the job to the degree needed to produce[Read More…]
Understanding plant and pest development can help provide the most effective and timely approaches to managing pests.
The Purdue Plant and Pest Diagnostic Lab (PPDL) recently received samples of Mugo Pine and Spruce that exhibited reddish-brown bands on needles of lower branches (Figs 1 & 2). Microscopic examination of needles confirmed the presence of Dothistroma,(Fig 3) a fungus that causes red band needle blight. Needles infected with Dothistroma first exhibit dark green bands on the needles that are quickly replaced with brown or reddish brown lesions. Only the base of the needle will remain green, with the remaining portion tan or brown. (Fig 4) Infection is typically more severe in the lower portion of the canopy nearest the ground. (Figs 5 & 6) In late Fall, black fruiting bodies (Fig 7) appear on needles and mature to release spores the following Spring and Summer. The spores are spread by wind and rain and can infect needles throughout the growing season. New needles are susceptible once they emerge[Read More…]