It ’s been over a yr sinceplantingyour first raspberry bush canes . This is the time of year your dream of a delicious raspberry harvest will come up rightful . Then one day , you notice the leaves are not the dark greenish they were just yesterday . regrettably , a disease could be the perpetrator . discover what disease lash out and how to battle them may preserve your crop from wipeout .
Prevention of Disease
snort Bush are susceptible to disease that can be fateful , but most of the disease can be controlled or forbid . Here are some preventative steps that may keep your raspberry crop :
Agrobacterium
Agrobacterium tumefaciens is a bacterium that produces galls on the crown of araspberry works . The diffuse , orotund , tan gall becomes black , irregular , grating , and corked . Plants may wilt , be stunt , or die from this bacteria .
Agrobacterium usually enters the raspberry through a fresh combat injury or natural first step . It can survive in soil and diseased tissue for eld . The bacterium are spread by rain splashing .
Fire Blight and Bacterial Blight
Significant browning of boo canes and cauterise - calculate stems and leaves may be have by the bacterial diseases ardour blight or bacterial blight . Disease enters the plant through an open wound or pruning slash . To prevent the spreading of the disease , cut out the diseased plant cloth 12 inches or more below the infected area . Destroy this diseased plant textile .
Anthracnose
Anthracnose is a fungal disease that causes the raspberry canes to turn brown . In the internodes of the cane or stems , sink white to tan pits formulate . red - purple margin often encircle these 1/4 inch or littler pits . Anthracnose stimulate the cane to check , step down , and often die during the winter .
Spur Blight
Spur blight is a fungal disease that begins in the leaf or at the guest where the leaf is attached to the cane . Purple or brown 1/2 column inch spots appear around the lymph gland . Leaves will become yellow-bellied and brown , fail , and fall off . Spur blight will cause the infected area to become non - productive .
Cane Blight
Cane blight is a fungal disease that begins in primocane combat injury internet site . A wound may start after tippruningor if the primocanes rub against a trellis wire or each other . This fungal contagion causes pestilence to form on the cane , sometimes encircling it . Early in the transmission , the cankers are blood-red - dark-brown under the bark .
The cankers can cause leaves in the infected area to droop then die . An entire cane may droop and die if the cankers gird it .
