Sentence:  However, the <WSD>cabbagehead</WSD> caterpillar (Crocidolomia binotalis Zeller) which is the secondary pest of cabbage, may become a serious problem, particularly during the dry season. 
Meaning of the word marked with <WSD> tags:  The larval form (caterpillar) of (species), which is a pest that eats cabbages.