Sentence:  According to our studies, B. thuringiensis is effective against DBM and <WSD>cabbagehead</WSD> caterpillar and does not have any detrimental effects on the parasitoid (Sastrosiswojo et al, 1977). 
Meaning of the word marked with <WSD> tags:  The larval form (caterpillar) of (species), which is a pest that eats cabbages.