Lynn, here's some information from the product label:
MIXING AND APPLICATION
SHAKE WELL BEFORE USING.
Green Light Lawn & Garden Spray may be applied with a trigger sprayer, hand-held, backpack, or hoseend sprayer. Use a hose-end sprayer that can be adjusted to provide a dilution rate of 2 fl ozs (4 tbs) per 1 gallon of spray. Add the required amount of product to the recommended amount of water, mix thoroughly and apply uniformly to plant foliage to the point of runoff. Mix only as much spray as needed for a single treatment. Do not store spray solution. Time applications to early morning/late evening to minimize the potential for leaf burn. In vegetable gardens, use no more than 3 gallons of spray for each 1,000 sq. ft. area. Do not use kitchen utensils for measuring. Keep measuring utensils with product away from children.
WHEN TO APPLY
Make applications when listed insect pests are present. Repeat applications may be made as indicated in the Home Garden Treatment Table below. For further information, see your state extension service recommendations for treatment guidelines in your area.
HOME GARDEN TREATMENT
Citrus Trees including, but not limited to: oranges, grapefruit, lemons, limes, and tangerines (to prevent fruit scarring from thrips, treat when fruit is marble size). Pests Controlled: Leafminers, katydids, thrips, and worms (caterpillars). Max. No. of Applications per Season: 6. Max. Days to Wait Before Reapplying: 6. Min. Days to Wait to Harvest: 1 (at least 1 week is recommended).
You can view the complete product label online here: http://www.organic-gardening-shop.com/agorganics/Images/LABEL_FILES/GL116Label.pdf
You will need to contact Green Light or Google Green Light for further info. Best Nancy.