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.
1 If tomatoes are planted close to walnut trees or related species including butternut and pecan, a chemical (juglone) released by these trees will induce wilting of tomatoes. 2  Waterlogged soil. 3  Sometimes when a soil gets waterlogged and the soil temperatures are high, it causes wilting of the plant.y tomato leaves are dying from the bottom of the plant up. One likely cause is early blight. Early blight is a fungus that attacks the tomato leaves and fruit beginning in June in Missouri. A distinguishing characteristic of early blight is the lesions on the leaves and stems.