Japanese Beetles can be easily controlled by Sevin XLR Plus...2 quarts/acre is the dosage for good control per the label. If you are going to maintain a vineyard of 3 acres you should be buying most of your chemicals from an agricultural supply company not Home Desperate. Sevin will run you about $50 a gallon. The good news is you only need to usually treat 2 or maybe 3 times for the year. So at most you are looking at a couple hundred dollars. The vines will bounce back and likely sprout new leaves but you are losing time waiting for the new leaves which in turn means the vine is not growing or producing carbohydrates...this in turn can weaken the vine as you go into winter which is never a good thing. If you are in the East your new leaves this time of year are particularly susceptible to Downy mildew infection unless you are still using Manzate in a non producing vineyard only or growing disease resistant hybrids. Do not fertilize its too late in the year for that. Final note if you are located in the east and growing anything other than highly disease resistant hybrids please forget about trying to be organic...you are just going to end up with dead vines, disappointment and a lot less money.