Sawflies

Sawflies are a group insects related to wasps that get their common name from the saw-like appearance of the ovipositor, which females use to cut slits in stems or leaves to lay their eggs. The plant-feeding larvae often look like caterpillars or slugs, and many are quite noticeable because they often stay together to feed in groups and quickly cause noticeable defoliation on their hosts. Learn more about sawflies in this article…

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Raspberries

One in the Plants Plus Series – a remix of past training presentations, printed materials and other references focused on specific plants or topics to help you increase your knowledge so you can better answer homeowner questions. To get 2 hours of continuing education credit for watching and reading this package of information, just complete the short quiz! This Plants Plus package focuses on growing raspberries.

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Bacillus thuringiensis (Bt)

Bacillus thuringiensis is the most common microbial insecticide used in the US. Known more often by its initials of Bt, this bacterium kills susceptible insects that ingest it, with different strains affecting different types of insects. Learn more about how this organism causes disease in insects and how it can be used as a biological pesticide…

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Boxelder Bug, Boisea trivittatus

Those pesky black and red bugs all over the place! Boxelder bugs are very noticeable in the fall when they congregate before overwintering in buildings. As long as they remain cold, they are inactive, but when warmed a furnace or sunshine, they become active and may crawl into the rooms. To learn more about this nuisance pest, read this article…

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Praying Mantids

The praying mantids are a group of insects with very characteristic front legs designed to capture and hold prey. The common name comes from the way the legs are held upright when hunting, but they don’t really have any religious affiliations. To learn more about these fascinating predators, read this article…

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Solanaceae: Growing Tomatoes, Peppers, and Eggplants

One in the Plants Plus Series – a remix of past training presentations, printed materials and other references focused on specific plants or topics. To get 1 hour of continuing education credit for watching and reading this package of information, just complete the short quiz! This Plants Plus package focuses on tomatoes and related vegetable plants.

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European Pine Sawfly, Neodiprion sertifer

If you’ve noticed masses or writhing, dark green “caterpillars” on your pine trees this spring, you likely have an infestation of European pine sawfly. This insect lives in large colonies, feeding on last year’s needles until they finish their development, then pupate in the soil or leaf litter. To learn more about this pest, read this article…

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Common Columbine Pests: Columbine Leafminer and Columbine Sawfly

If you have columbines in your garden, you likely have seen squiggly white trails or blotches on the leaves or had the entire leaf devoured at one time. These are significant as cosmetic problems, but generally have little impact on the plant’s health. Learn more about the life cycle of the two insects that cause these problems and how to deal with them in this article…

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Goldenrod Gall Fly, Eurosta solidagnis

You’ve probably seen spherical swellings on goldenrod stems at one time or another, but do you know what caused those? A type of small fly with patterned wings is responsible for the most common gall on goldenrods. To learn more about the goldenrod gall fly and how it creates those golf ball-sized growths, read this article…

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Silver spotted skipper, Epargyreus clarus

Skippers are a group of small butterflies with quick, darting flights. The silver spotted skipper is one of the largest skippers. This chocolate-colored butterfly is easily identified by the conspicuous white or silver spot on the underside of its hind wing that gives it the common name. Read about this common, but often overlooked butterfly, in this article…

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