Grape yellow disease rescue

Grape yellowing disease is mainly a physiological disease caused by insufficient supply of iron, especially Kyoho grapes occur most. Iron is a redox catalyst in plants and has a close relationship with chlorophyll formation. It is also a component of some respiratory enzymes. Iron deficiency can not form chlorophyll, young leaves chlorosis pale green or yellow, only the veins are green. Severe yellow-white leaves fall from the top down. During the growing season, take the following measures to rescue: 1. Irrigate the roots: Open the roots of the grapes and expose a few thick roots. Cut the roots with a small knife to cut the size of the fingernails, then apply 2.5% ferrous sulfate and Fermentation liquids such as livestock, horns or cakes. The result is a tree of 25 kg per tree. 2, fertilization: apply more fertilizer, according to the size of the vine, in the vicinity of the root depth ditch depth 30 to 40 cm, width 30 cm (a width), the fertilizer mixed soil, buried in the ditch, and then irrigation Root fertilizer can increase yield and quality, but different types of fertilizers also have different effects. For example, human fecal urine is more effective because it is rich in nitrogen (0.5 to 0.8%) and phosphorus (0.2 to 0.4). Nutrients such as %) and potassium (0.2-0.3%) can not only be quickly absorbed by plants, but also promote the growth and development of foliage and fruits, as well as soil improvement. 3, pouring vinegar: the use of tap water poured garden grapes, must be dry for 2 to 3 days, because there is bleach in the tap water, commonly used to increase the soil salinity. To make the water neutral, add 1% vinegar and then water to treat yellowing. If conditions permit, spray the FCL compound iron preparation.

Posted on June 19, 2018