Cultivation and fallowing of land will lead to a decline of populations of the dagger nematode, so a nematicide treatment may NOT be necessary, or even make a difference. If in doubt about the presence of economically-damaging levels of this nematode, soil should be tested. Blossom-end rot is caused by a calcium deficiency in the fruit and occurs in plants subjected to drought stress. The initial symptoms are brown spots at the blossom end of the fruit which later enlarge, darken and become leathery. Decay may occur as a result of microbial activity.
Cultivars can differ in their susceptibility to the problem.
Watering operations that avoid drought stress can reduce or eliminate the problem. Excess nitrogen fertilizer may also contribute to blossom-end rot. Cultivars can differ in susceptibility. Cracks scarring, and pitting can be caused by mechanical damage when fruits are young, Insects can also cause such injury. Splitting is caused by an erratic watering pattern, particularly the excessive accumulation of water.