David Owens, Extension Entomologist, owensd@udel.edu
Congratulations to Bob Leiby for correctly identifying the cause of the whitish yellow speckles on the leaf as feeding injury caused by two spotted spider mite. This is a common greenhouse invader, especially when winter annuals have been allowed to grow around the inside perimeter of a greenhouse, allowing spider mites a host for overwintering before crawling onto new transplants. Last year, we observed extremely large populations of spider mite early in melon fields, most likely because plants had mites in the greenhouse.
