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 unusually heavy rains saturate the soil, a tomato plant's leaves may curl. Plant roots need air, just like the above ground parts. When heavy rains saturate the soil, the roots can't get enough air. This can result in root damage, which causes the tomato to react in a similar way to sudden hot weather.
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.