Beet armyworm
substantial population of caterpillars, the damage can spread to the stems, and in the worst cases to the fruit. This often leads to the entire contents being [...] cocoon, consisting of soil particles glued together with a sticky secretion. Pupae are brown and 15 to 20 mm long, and resemble those of other noctuid moths [...] a regular problem for horticulturalists due to its resistance to nearly all insecticides, and its ability to develop on wild vegetation during the summer