PESTS & DISEASES
Black Knot Disease
Shubert chokecherry trees, plum trees, wild chokecherry and pincherry trees are susceptible to this disease. Early stages will show the black swollen growths on the branches and twigs. These must be removed a minimum of eighteen inches from the ‘knot’ towards the tree trunk and the pruners sterilized with each cut. The necessity of removing these are that the spores are formed in these growths. If left on the tree the spores will continue to infect trees of this variety. Once there are signs of infection in the trunk, which is manifested by cracking or splits, the tree will not survive and should be removed. Another such specimen should not be planted in that area or surrounding as the spores have a possibility of remaining in the soil and remaining roots.
Impatiens Downy Mildew has Arrived in Manitoba!!
If any of your Impatiens walleriana have the traits of the above picture,
for more information: http://www.mgmanitoba.com/ask-an-mg/
Spotted Winged Drosophila
The Spotted Winged Drosophila (Drosophila suzukii) (SWD) is a vinegar fly of East Asian origin that can cause damage to many soft-skinned fruit crops. SWD pierces seemingly healthy fruit, and lays its eggs. The eggs hatch in about 3 days, the larvae feed on the fruit and emerge as adults after 6-28 days. Early detection is critical because symptoms often do not appear until after the fruit is harvested. Commonly confused with the common fruit fly, Drosophila melanogaster, SWD differs as it attacks unripe to ripe fruit, whereas the common fruit fly feeds on overripe and rotting fruit.
SWD most commonly afftects raspberries, strawberries, blueberries, cherries and plums. It was first identified in Manitoba in commercial berry fields in August 2013.
For continued updated information on SWD follow this link:
Ladybug Larvae eating Aphids.
An example of healthy biodiversity in the garden. This is a major reason to acquaint oneself with lady bug larvae and not destroy them.
This is an example of the fall webworm which appears in late summer or fall and how it manifests on common trees. The fall webworm is a tent caterpillar much as the forest tent caterpillar is. The most effective way of eradicating this worm is to prune off all affected branches from your tree or shrub and throw it into the trash. If the branches are too high to prune hose the web with strong water pressure so as to break up the webbing and making the worms accessible to foraging birds.
Poison Ivy – in Autumn foliage