Numerous bulges, convex blisters can be seen on the vine leavesOn the underside of the leaf, under the blisters, there is a tarnish in the form of white-gray or silvery spots. These are the symptoms of pest feeding - your grapevine has been attacked bygrapevine spear(Colomerus vitis). Seehow to combat the curl on grapevinesand what are the recommended sprays for this pest.
Symptoms of Fibrosis feeding on the grapevine
Fig. CC0, Wikimedia Commons
Over time, the wartybulges on the surface of the vine leavesbecome more and more distinct, and the fiber spots underneath the leaves turn brown. Foraging pests hide precisely within these spots, under a hardwood cover. At that time, they weaken the grapevine bushes, inhibiting their growth and limiting yielding.Grapevine causes the greatest damage in the cultivation of young and newly planted grapevinesOlder plants can withstand the attack of this pest better.
Female fibrosis hibernate under bud scales . In spring, when it gets warmer, they switch to young leaves and start feeding. In order to prevent this from happening, sprays are performed in the spring.
Unfortunately, there are currently no registered preparations for controlling the fibrosis on grapevines. Therefore, in amateur viticulture on the plot, we should first of allremove leaves attacked by the pestto prevent its development and feeding.In autumn, you must rake and remove (preferably burn) all fallen leaves from the bushes.
In the spring, about a week before bud break, spraywith the following preparations: Siarkol 800 SC, Siarkol 80 WG or other sulfur fungicide at a concentration of 2-3%. This treatment hinders the emergence of females of the pest hibernating under the bud scales.
During the growing season,with a very large number of grape fibrosis , acaricides can be used to combat spider mites on grapevines, e.g. Ortus 05 SC (dosage 10-18 ml per 5-10 liters water, can be used from the moment you notice the symptoms of unsightly feeding on the leaves until the grape ripening stage, with a grace period of 28 days, performing only one treatment per season).
Agents for spraying pests and diseases of grapevinescan be ordered in the shop of our guide. To view the offer, press the button below.
"border=0
