Cooking and purifying the base. 3 Next, the gum base is cooked in kettles at 243 degrees Fahrenheit (116 degrees Celsius) until it has melted into a thick syrup. To purify it, workers pass it through screens and place it in a high speed centrifuge before refiltering it, this time through finer screens.
When tomato leaves curl due to viral infections, you'll usually see other symptoms. Tomato plant leaves are sensitive to some viral diseases that cause the leaves to curl. These viruses affect the plantâs appearance and also reduce fruit yield and quality. If the only symptom is curled leaves, your tomato plant might have a condition known as physiological leaf roll.
Many gardeners have been puzzled by the sudden wilting and death of tomato plants. Possible causes of wilting include lack of water, vascular wilts, tomato spotted wilt virus, walnut toxicity, or stalk borers. Tomato plants require approximately 1 inch of water per week.