Red Blotch In Grape Vines Flashcards
What is grapevine red blotch?
A viral disease affecting grapevines, characterized by red blotches on the leaves.
True or False: Grapevine red blotch is caused by a fungus.
False
Which virus is responsible for grapevine red blotch?
Grapevine red blotch virus (GRBV)
Fill in the blank: The primary vector for grapevine red blotch is the __________.
three-cornered alfalfa hopper
What are common symptoms of grapevine red blotch?
Red leaf blotches, delayed ripening, and reduced fruit quality.
Multiple Choice: What is one way grapevine red blotch can spread?
A) Through infected cuttings B) By wind C) Through soil D) By rain
True or False: Grapevine red blotch only affects red grape varieties.
False
What is the impact of grapevine red blotch on grape yield?
It can significantly reduce grape yield and quality.
Fill in the blank: Grapevine red blotch was first identified in __________.
California
What type of management practices can help control grapevine red blotch?
Vector control and removal of infected plants.
Multiple Choice: Which of the following is NOT a symptom of grapevine red blotch?
A) Green leaf veins B) Red leaf blotches C) Delayed ripening D) Reduced fruit quality
True or False: Grapevine red blotch can be transmitted through pruning tools.
True
What is the typical season for observing symptoms of grapevine red blotch?
During the growing season, especially in late summer.
Fill in the blank: Grapevine red blotch can lead to __________ of fruit.
poor ripening
What are the long-term effects of grapevine red blotch on vineyards?
Increased management costs and potential vineyard loss.
Multiple Choice: Which practice is recommended for managing grapevine red blotch?
A) Regularly monitor for symptoms B) Increase irrigation C) Apply fungicides D) Use synthetic fertilizers
True or False: All grape varieties are equally susceptible to grapevine red blotch.
False
What is the recommended action if a grapevine is found to be infected with red blotch?
Remove and destroy the infected plant.
Fill in the blank: The main method of preventing grapevine red blotch is __________.
using certified virus-free plant material
What role do insects play in the spread of grapevine red blotch?
They act as vectors that transmit the virus from plant to plant.
Multiple Choice: Which of the following is a symptom of grapevine red blotch?
A) Leaf curling B) Leaf discoloration C) Fruit drop D) All of the above
True or False: Grapevine red blotch can only be detected through visual inspection.
False
What diagnostic method can confirm grapevine red blotch infection?
Molecular techniques such as PCR.
Fill in the blank: The grapevine red blotch virus belongs to the family __________.
Geminiviridae
