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Green alfalfa weevil larvae with a white stripe running down its body.

Alfalfa Weevil Activity Prediction Update: May 29, 2025

The lowest calculated degree days in South Dakota indicate that fourth instar larvae should be active, while the highest calculated degree days suggest that pupation is occurring in the field.

Fusarium Risk Tool map for May 29, 2025. For a detailed description, please call SDSU Extension at 605-688-4792.

Fusarium Head Blight Update: May 29, 2025

Fusarium head blight, also known as scab, is a fungal disease that infects wheat heads during flowering. Recent weather conditions across South Dakota have provided the environment needed for Fusarium head blight to begin infection.

Green to yellow kochia plants within sixteen, separate black pots filled with brown soil. Green, white, pink and blue marker stakes are within the pots denoting treatments.

Dicamba-Resistant Kochia Can Likely Be Found Across South Dakota

Kochia populations collected across South Dakota have been subjected to an herbicide effectiveness screen, where a treatment of dicamba was applied and some kochia plants exhibited survival and regrowth after treatment.

Poinsettia relatives: Euphorbia horrida, crown of thorns, and Euphorbia polychrome.

The Poinsettia and Its Relatives: Exploring Unique Euphorbia Species

Euphorbias are versatile plants, with species suitable for both indoor and outdoor environments. Whether used as decorative houseplants, or as garden perennials, these plants offer a unique aesthetic, and require minimal care.

Poinsettia plant in a dimly lit living room.

Keeping Your Poinsettia Alive for Next Christmas and Getting It to Re-Bloom

With proper care, the poinsettia’s vibrant colors can be maintained throughout the year. Learn some tips tfor keeping poinsettias thriving and blooming again for the next holiday season.

Cluster of bright-red poinsettia flowers in bloom.

Are You Photoperiodic? Poinsettias Are: An Explanation of This Unique Plant Process

Poinsettias are photoperiodic, which means they rely on cues from nature, like the shortening day or night, to change how they grow. Learn all about this unique plant process and how it helps Poinsettias bloom and re-bloom.

A patch of Sweet Woodruff in bloom in a garden.

Sweet Woodruff: Attractive Groundcover for Shady Gardens

Sweet Woodruff (Galium odoratum) is an attractive plant that makes a finely textured ground-cover perennial for shade gardens.

A green plant with spire-like white and pink flowers.

Lupines for Northern Gardens

Lupines (Lupinus), a genus of plants in the legume family Fabaceae, are popular plants in the United States. In addition to their aesthetic value, lupines provide a variety of benefits to the garden.

A lush plant with spoted leaves and pink and purple flowers throughout.

Lungwort: A Winter-hardy Perennial for Shade or Part-shade Gardens

Lungwort is a great plant for the partly sunny or shade garden, offering multiple seasons of interest, starting with flowers in early spring, followed by the development of new, basal leaves decorated with white spots and blotches.

Red-brown colored weevil with bent antennae originating on the elongated mouthparts.

Red Sunflower Seed Weevils in South Dakota

Fact sheet on red sunflower seed weevils in South Dakota