Sawfly Rosanna downward
SymptomsThe young shoots of roses in the spring of a sudden fade (usually the most tender young top) and gradually dry up. It wilt not begin from the base, and with a particular place on the shoot. If you break off an escape in this place, you can see the "progress" - here the female sawfly eggs. Himself pest - a caterpillar yellow-white with light brown head. |
TreatmentDamaged shoots are cut off. Other effective methods of struggle does not exist, because inside to escape the action of the larva is not available insecticides. In the spring as a preventive measure you can sprinkle rose systemic insecticide (Akhtar).