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.
What Causes Tomato Plants' Leaves to Start Dying From the Bottom? Growing tomatoes in the home garden can be a productive and rewarding endeavor. However, a gardener may become frustrated if their well-maintained tomato plant begins dying, starting with the bottom leaves and spreading upward. This type of death could be caused by a number of pathogens, most of them fungal.