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Planttalk Colorado™ is sponsored by Colorado State University Extension, Denver Botanic gardens, and the Green Industries of Colorado. For additional information on gardening, see Plant Select® and Extension Publications.

Search Results for: powdery mildew

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1833 – Powdery Mildew on Vegetables

Many vegetable crops are susceptible to powdery mildew. Plants affected with this fungal disease usually appear coated with talcum powder or flour. Some plants such as tomatoes, peppers and onions may only have yellow colored leaf patches. As the disease progresses, leaves, buds and stems are distorted. Leaves drop prematurely and flower buds fail to […]

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1415 – Powdery Mildew

The presence of a white, dusty talcum-like substance on leaves makes diagnosis of powdery mildew easy. It’s more likely to appear in mid- to late summer when cool evenings follow warm, humid days. Lilacs, roses and a few garden perennials such as phlox and rudbeckia are susceptible to powdery mildew in Colorado. Left untreated, powdery […]

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1415 – Oídio

La presencia de una sustancia como talco blanco en las hojas hace que el diagnóstico de oídio sea fácil. Este oídio es menos prevalente en regiones semi-áridas; hay mayor posibilidad que aparezca a mediados o tarde en el verano, cuando las tardes frescas siguen a los días tibios y húmedos. Las lilas, rosas y algunas […]

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1433 – Enfermedades del rosal

¡Qué hermosas son las rosas! Por lo general, la belleza de estas flores justifican el arduo trabajo que ellas necesitan. Pero, estas plantas son susceptibles a una variedad de enfermedades, aunque, hay rosales resistentes, tales como las especies de arbustos, los cuales son practicamente libres de enfermedades. Si usted es un jardinero al que no […]

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Insectos & Enfermedades

Ajardinar Árboles y Arbustos Césped Frutales Hogar/Plantas de interior Jardín Pesticidas Varios Ajardinar Ácars Abejas solitarias Ácaros de la correhuela Amarilleo del Áster (Estrella) Avispas cartoneras Gusano de los brotes del tabaco Hormigas & plantas de jardín Moho de fango Mosquita blanca de los invernaderos Oídio Árboles y Arbustos Ampolla de la hoja del roble […]

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1841 – Time to Seed Fall Vegetables

Although it may seem that vegetable gardens have just begun growing well and planting is done, it’s time to seed crops for fall harvest in July, and early August. Crops that require sixty days until maturity, and which are planted in July will mature in September as weather is cooling. Look at seed packets and […]

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1745 – Rose: Shrub Roses

Shrub roses are among some of the most hardy and successful flowering shrubs for Colorado. Once established, they tolerate arid conditions, rebound nicely from hailstorms, are disease-resistant, and need little maintenance. Many bear scented flowers or rebloom throughout the growing season. Wild roses (Rosa woodsii) grow naturally throughout Colorado. Plant shrub roses as single feature […]

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1764 – Some Under-used Woody Plants for Colorado

Here are some attributes of three under-used landscape trees. All can be seen in the arboretum at the Department of Horticulture/Landscape Architecture Plant Environmental Research Center, located at the southwest corner of the Colorado State University campus, or at the Center Avenue woody plant research site located directly north of the gardens on Spring Creek, […]

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1747 – Flowering crabapple

The Front Range of Colorado area is known for its crabapple blooms in April and May, but these medium-sized ornamental trees can be grown in landscapes throughout much of Colorado. Some varieties can even be grown at 8,000 feet elevation. Crabapples are defined as apples with fruit smaller than two inches in diameter. The fruit […]

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2022 – Plant Select® 2001

The year 2001 marks the fifth anniversary Plant Select® introducing and promoting plants of outstanding horticultural merit to the Rocky Mountain and Plains states. Since 1997, the program has promoted 31 annuals, perennials, shrubs and trees. Seven varieties are being promoted this year. CORONADO® Hyssop (Agastache aurantiaca) has yellow and orange flowers from midsummer to […]

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