Carrots are a wonderfully diverse crop with a wide array of varieties available to growers. Within this diversity lies the potential for identifying varieties that have higher natural resistance to particular kinds of insect pests. Although it is not a major pest in Indiana, the carrot weevil (Listronotus oregonensis) (Figure 1A) is a serious pest[Read More…]
Carrots
Last fall, my lab received a carrot sample with disease-like lesions (Figures 1 and 2). There are at least 3 carrot diseases that may appear similar. These diseases are: Alternaria leaf blight (late blight), Cercospora leaf spot (early blight) and bacterial leaf blight. Often an examination in the laboratory is necessary. My examination revealed the characteristic spores[Read More…]