vertex rot in tomato fruits develops when there is lack of calcium and insufficient watering of plants

alternaria anthracnose anthrax bacteria bacterial bacterium blight bugs calcium canker colletotrichum crop curl dangerous deficit develops disease dots foliage fruits fungus fusarium garden infection infestans insects insufficient lack mildew moisture mold mycelia nitrogen penicillium pests phytophthora plants potassium problem rot septoria sick sickness solani spot stain there tomato tomatoes unhealthy vegetable vertex verticillium viral virus watering wilt