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Cacopsylla pyricola, commonly known as the pear sucker, [1] is a true bug in the family Psyllidae and is a pest of pear trees ().It originated in Europe, was introduced to the United States in the early nineteenth century and spread across the country in the next century.
Psylla pyri damages pear trees by sucking the plant sap; leaves are yellowed and distorted and flower buds and fruitlets are shed. The excess honeydew produced by the insects coats the leaves, covering up the stomata, and encourages the growth of sooty mould. The size of fruit is decreased and tree growth is diminished. [2]
Rust, Kern's pear Gymnosporangium kernianum. Rust, Pacific Coast pear Gymnosporangium libocedri. Rust, pear trellis (European pear rust) Gymnosporangium fuscum. Rust, Rocky Mountain pear Gymnosporangium nelsonii. Side rot Phialophora malorum. Silver leaf Chondrostereum purpureum. Sooty blotch Gloeodes pomigena. Thread blight (Hypochnus leaf blight)
Pyrus calleryana, also known as the Callery pear or Bradford pear, is a species of pear tree native to China and Vietnam, [2] in the family Rosaceae.It is most commonly known for its cultivar 'Bradford' and its offensive odor, widely planted throughout the United States and increasingly regarded as an invasive species.
The Callery pear, or Bradford pear, is one of those vampires. Over the years, Callery pear (Pyrus calleryana) has become one of the most widely planted ornamental trees in the US. But over that ...
“This is detrimental for insects, birds, and other animals that rely on native plants. ... Related: 5 White Flowering Trees to Plant Instead of Bradford Pear. Common Periwinkle (Vinca minor) ...
The insects are found on the pads of prickly pear cacti, collected by brushing them off the plants, and dried. Chemical structure of carminic acid, the predator-deterring substance found in high concentration in cochineal insects: The insoluble aluminium and calcium salts of this acid form red and purple dyes called "carmine".
“When you bring a living plant that’s 6 or more feet tall into your home, you also could bring in all kinds of insects,” says Eric Benson, PhD, professor and extension entomologist, Clemson ...