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Winter Injury to Boxwood in Iowa

Typical signs of freezing injury are a blackened/brownish discoloration or bleaching of plant tissue. If the freezing injury kills a significant number of buds or cambial tissue, the plant may die or suffer so much crown die-back that it becomes unusable. If freezing injury is limited to flower buds and shoot dieback, it may require corrective pruning and time to allow the plant to grow out of the damage. Read more about Winter Injury to Boxwood in Iowa


Minimize Deicing Salt Damage in the Home Landscape

Snow and ice are headaches for motorists and pedestrians. To prevent accidents on slippery surfaces, highway departments, businesses and homeowners use deicing compounds  to melt ice and snow on roadways, parking lots, sidewalks and driveways. While deicing materials improve travel conditions, they can damage automobiles, concrete surfaces and landscape plants. Read more about Minimize Deicing Salt Damage in the Home Landscape


Freeze Damage to Landscape Plants

Fortunately, trees and shrubs have the ability to leaf out again if the initial growth is damaged or destroyed.  Healthy, well established trees and shrubs should not be greatly impacted and will produce additional growth within a few weeks.  Trees and shrubs planted within the past 3 to 5 years may benefit from a light application of fertilizer and periodic watering during dry weather. Read more about Freeze Damage to Landscape Plants


The Economics of Aphids Infestations

There are both wingless and winged forms, according to Matt O’Neal, assistant professor, Entomology. He says wingless soybean aphid adults are about 1⁄16 inch in length, pale yellow or green, and have dark-tipped cornicles (tail pipes) near the end of the abdomen. The winged form has a shiny black head and thorax with a dark green abdomen and black cornicles. Read more about The Economics of Aphids Infestations


It Takes Three to Make a Plant Sick

The first “side” of the triangle is so obvious it may be overlooked. In order to have a plant disease, you must have a plant. More specifically, you need a susceptible plant, one that is able to get a particular disease. Each plant species is prone to a unique set of maladies. Crabapples and oaks get different diseases. Within a species, plant varieties differ in their susceptibility to various diseases. For example, some crabapple cultivars are decimated by apple scab while others are unaffected. The overall health and vigor of an individual plant also affects its susceptibility to disease. Read more about It Takes Three to Make a Plant Sick


Bagworms: A Review and a Prediction

The bagworm caterpillar lives its entire life inside a tough protective case made of silk and camouflaging bits of foliage. Each caterpillar makes its own bag that it carries around as it feeds with the head and legs sticking out the open, top end of the bag. As the caterpillar eats and grows the bag is enlarged until by the end of the summer, what started as tiny pods only one-quarter inch long will have grown to almost two inches in length. Read more about Bagworms: A Review and a Prediction