Summarize the following:
This can vary depending on your geographical location or the climate. Become familiar with the types of pests present in your area to help you identify which ones are causing your issue. You will need to know the specific insects because many insecticides are only effective against certain types of pests. For instance, the grape berry moth is a common pest found in the northeastern United States. The insecticides Intrepid or Sevin are rated as highly effective in controlling them, but Assail is not effective at all. Assail is effective, though, in controlling leafhoppers, which are prominent pests in California and the western United States. You will need to read the labels to be sure you get the right product. For instance, if you've determined that your insect problem is from the grape berry moth, you will need a product that specifically states that it is effective in controlling grape berry moths. Some products, like Home Orchard Spray, aim to control a variety of common grape vine pests including the grape berry moth, Japanese beetle, and rose chafers. A broad-scope product may be a good option if you have multiple types of pests and/or haven't been able to identify the specific type of insect affecting your vines. Pesticides typically range from $10.00 - $20.00 USD and can be purchased as a concentrate that needs to be mixed with water, or as a ready-to-use spray. Read the label thoroughly before you use a pesticide. Wear gloves and goggles while you spray so you don't come into contact with any chemicals. Some pesticides are not safe for consumption so make sure to follow the label directions. Don't let pets or people near grapes you've sprayed until the amount of time passes as recommended. There are many organic pesticides that contain neem oil. The products are available as a dust, wettable powder, or a concentrate to be mixed with water. Check online or at your local home and garden store to find a product that fits your needs. Neem oil should not be applied to table grapes after they have bloomed, so apply it to the vines early in the season for the best results. Follow the instructions on the label. Some products require certain temperatures to be effective, a waiting period before the grapes can be consumed, and some should only be applied during certain growing stagesfor instance, not when the fruit is blossoming. Reapply the pesticide as needed and as directed on the product label. Be sure to wear protective gear like gloves and safety glasses when applying chemicals.

Summary:
Observe your grapes to determine the type of insect infestation you have. Find a home and garden pesticide specific to your type of insect. Use neem oil to protect your grapes from insects naturally. Apply the pesticide to your grape vines.