What Causes the Drying and Yellowing of Grapevine Leaves
A bit of knowledge to share with you about the causes of drying and yellowing of grapevine leaves in the field of horticulture. Please refer to the detailed introduction below.
What Causes the Drying and Yellowing of Grapevine Leaves
The leaves of grapevines are dry and yellow, which might be caused by excessive pesticide spraying, leading to leaf burn. It's necessary to wash the leaves with a large amount of water. It could also be due to over-watering, in which case the frequency of watering should be reduced. Alternatively, high temperatures might be the cause, requiring shading measures and spraying water to cool down and promote vigorous growth of the grapes.
Damage from Pesticides
When growing grapevines, if the pesticides used are inferior or contain organophosphorus, they can burn the new green leaves of the plant. Therefore, it's essential to wash the vine leaves with a large amount of water immediately to remove the pesticides and carefully maintain the leaves for a period, after which the vine will recover.
Too Much Watering
When watering grapevines too frequently, the plant can be soaked in water for an extended period, causing the leaves to rot and turn yellow. It's necessary to stop watering and drain the excess water from the soil, wait for about a week, and then water the grapevine again. Mixing potassium dihydrogen phosphate with the water can promote the rapid recovery of the grapevine.
High Temperature
In an environment with a suitable growth temperature of 20 to 25 degrees Celsius, if the temperature exceeds 35 degrees, it can cause a significant evaporation of water from the plant, leading to dry and yellow leaves. Therefore, it's necessary to take shading measures for the grapes and spray a large amount of water around to lower the ambient temperature.
Applying Additional Fertilizer
Grapevines require sufficient nutrients during growth. If the nutrients are insufficient, the soil can become barren and dry, causing the leaves to turn yellow and lose their luster. In this case, it's necessary to apply additional fertilizer to the grapevine, using matured organic manure or organic liquid fertilizer to promote more vigorous growth.
The detailed explanation provided above on the causes of drying and yellowing of grapevine leaves is hoped to bring you assistance in green plant management!