Agriculture
- Rose Rosette Disease
Rose rosette disease is an untreatable rose disease caused by the Rose rosette virus (RRV), and is spread and introduced into the rose during feeding by the rose leaf curl mite (Phyllocoptes fructiplilus). This extremely small eriophyid mite feeds on...
- Botrytis Blight
Botrytis blight, also know as gray mold, is a fungal disease caused by several species in the genus Botrytis. It affects the buds, flowers, leaves, and bulbs of many plants including: African violet, begonia, chrysanthemum, cyclamen, dahlia, geranium,...
- Homemade Pesticides For Roses
by Angela Ryczkowski, Demand MediaNumerous cultivars of roses (Rosa spp.) are prized as landscape specimens for multiple available growth habits and their attractive, fragrant blooms, which are commonly utilized as cut flowers. Rose plants are potentially...
- Effects Of Sodium Bicarbonate On Plant Growth
Saturday, July 20, 2013 By Giselle Diamond Sodium bicarbonate is more commonly known as baking soda. It has been used for many different purposes, including for its benefits to plants. Baking soda is used to keep mold from growing on plants and...
- Fungicides Can Increase Asian Maize Production: Case Study
Traditionally, maize has been grown in Asia primarily as a subsistence food crop. In recent years, the per capita consumption of maize as a food crop has declined while the use of maize as a feed crop for livestock has increased. Maize yields are especially...
Agriculture
Common Rose Diseases
By Marie Iannotti, About.com Guide
Despite the best efforts to keep roses disease free, there will inevitably be period problems to deal with. Keep tabs on your rose bushes so that you can remedy the situation before it gets out of hand. Be sure to accurately identify the problem before reaching for a spray and start with the least toxic solution.
- Black Spot: Black spot is a fungus that is very common during humid weather because it is a water-bourne disease. As its name implies, small black spots form on leaves and stems, eventually causing the leaves to drop and weakening the plant.
Treatment: Choose black spot resistant varieties and be meticulous about sanitation. Water the roots of the rose, avoiding the foliage. Water in the morning, so that splashed leaves have time to dry off. If Black Spot is an annual problem, try a dormant spray of lime sulfur at the end of the season and again in early summer. Once Black Spot appears, it is hard to stop. Neem oil and Sprays containing Potassium bicarbonate are somewhat effective. - Downy Mildew: Downy mildew is a very serious disease that spreads rapidly and can defoliate a rose plant in days. It is not as common as Black Spot and favors cool, wet weather. Purple spots with yellow edges form , often on the veins on the top side of the leaves and along the stems. Pale gray fuzz can form on the under side of the leaves. The leaves will eventually become brittle and fall.Treatment: The good news is that Downy Mildew often clears up with the weather. To reduce the chance of Downy Mildew, practice good garden sanitation and keep the rose plants well pruned for air circulation. As with other diseases, a dormant spray may help.
- Rust: A Rust infection is easy to spot. Small orange pustules spots form on the undersides of the leaves. This fungus can also cause defoliation. Rust is most prevalent when nights are cool.Treatment: Treatment of Rust is similar to treatment of Black Spot, above: Good sanitation and a preventative dormant spray after pruning. Once infected, remove all infected leaves and try Neem oil for control.
- Mosaic Virus: Once a rose is infected with Rose Mosaic Virus, there?s not much to be done except check with the nursery for a replacement. Rose Mosaic Virus shows up as yellow mottling on leaves and deformed new growth. It can stunt growth or it can be a mild infection. If there are only a few affected leaves, the plant may continue growing and blooming fine. The really good news is that it won?t spread to your other roses.
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- Rose Rosette Disease
Rose rosette disease is an untreatable rose disease caused by the Rose rosette virus (RRV), and is spread and introduced into the rose during feeding by the rose leaf curl mite (Phyllocoptes fructiplilus). This extremely small eriophyid mite feeds on...
- Botrytis Blight
Botrytis blight, also know as gray mold, is a fungal disease caused by several species in the genus Botrytis. It affects the buds, flowers, leaves, and bulbs of many plants including: African violet, begonia, chrysanthemum, cyclamen, dahlia, geranium,...
- Homemade Pesticides For Roses
by Angela Ryczkowski, Demand MediaNumerous cultivars of roses (Rosa spp.) are prized as landscape specimens for multiple available growth habits and their attractive, fragrant blooms, which are commonly utilized as cut flowers. Rose plants are potentially...
- Effects Of Sodium Bicarbonate On Plant Growth
Saturday, July 20, 2013 By Giselle Diamond Sodium bicarbonate is more commonly known as baking soda. It has been used for many different purposes, including for its benefits to plants. Baking soda is used to keep mold from growing on plants and...
- Fungicides Can Increase Asian Maize Production: Case Study
Traditionally, maize has been grown in Asia primarily as a subsistence food crop. In recent years, the per capita consumption of maize as a food crop has declined while the use of maize as a feed crop for livestock has increased. Maize yields are especially...