Resistant Cultivars
Cultivars that are known to be partially to fully resistant to certain insect
pests should be considered when renovating an existing vineyard or planting a
new one. Some cultivars have demonstrated resistance or tolerance to certain
root dwelling insects. It should be noted however, that in many situations
growers do not have the flexibility of avoiding susceptible cultivars. The
demand for a specific juice or wine often dictates which cultivars are planted.
Behavior and Biology
Understanding an insect's behavior and its biology helps determine the best
method for controlling an individual pest. Knowing an insects overwintering,
reproductive, and feeding habits allows one to determine the best control method
available as well as the best time to initiate it.
Identifying and Understanding the Major Insects and Mites on
Grapes
Growers must be able to identify major grape pests so that correct management
decisions may be made. A grower needs to know something of the life history, and
biology of the vineyard pest complex. Threshold levels and scouting techniques
must be understood for each vineyard pest so that appropriate action may be
taken. Choices must be made with a thorough understanding of the impact they
might have on non-target species, crop residues, water contamination, and the
applicator and those who may be directly or indirectly affected by the selected
strategy and its implementation.
Current pesticide recommendations may be found Here