According to Entomologist Thomas M. Dykstra, Ph.D. of Dykstra Laboratories in Gainesville, Florida, insect pests can't attack healthy plants. Learn more and ask your questions in this live radio show.In the show, Thomas mentions that anyone can measure leaf brix with two tools: 

A garlic press that you can easily clean

A refractometer 
Thomas also mentions a PDF Leaf Brix Chart. Here are two versions of it to download:Leaf Brix ChartLeaf Brix Chart with Insect GroupsThe prize for today's show was a copy of Joe Lampl's new book:The Vegetable Gardening Book: Your complete guide to growing an edible organic garden from seed to harvestThe host of The Urban Forestry Radio Show and Podcast is Susan Poizner of the fruit tree care education website www.orchardpeople.com.  Tune into The Urban Forestry Radio Show LIVE by going to RealityRadio101.com on the last Tuesday of every month at 1.00 pm Eastern Time.Learn to grow organic fruit trees successfully. Sign up for OrchardPeople.com's premium online courses at https://learn.orchardpeople.com/. These show notes may contain affiliate links to products. We may receive a small commission for purchases made through these links at no cost to you. Thanks for your support!