By T. et al.(eds) Ames
This box advisor provides info on universal pests, illnesses and dietary issues of candy potato. it really is meant essentially as a device for proper id of those difficulties and illnesses, as an important first step of their regulate.
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Additional info for Sweetpotato: Major Pests, Diseases, and Nutritional Disorders
Example text
Light trapping can be used to monitor the population of adults. When a large increase in adult numbers occurs, manual removal of small larvae can prevent the buildup of an outbreak population of the voracious late instar larvae. Pesticide use disrupts the action of the egg and larval parasites of the hornworm. Armyworms Spodoptera eridania, S. exigua, S. litura (Lepidoptera: Noctuidae) Description. Adult female moths of 5. eridania are light brown with dark spots on their front wings (Fig. 35).
They enter stemborer tunnels in search of larvae. Occasionally they climb the foliage to prey on leaf folder larvae. They can consume 20-30 prey daily. Spiders The importance of spiders as predators has been clearly demonstrated for rice, but their role has not been studied adequately in many other crops and little is known about their contribution to biological control of sweetpotato pests. The lynx spider Oxyopes sp. and the wolf spider Lycosa sp. are abundant in sweetpotato fields. These do not spin webs but rather hunt prey directly.
Pheidole and Other Predacious Ants Cuban farmers practice augmentation of Pheidole megacephala (Myrmicinae) and Tetramorium guinensis (Myrmicinae) to control the sweetpotato weevil, C. formicarius. Several ants—Pheidole sp. (Fig. 50), Iridomyrmex anceps (Dolichoderinae), and Anoplolepis longipes (Formicinae)—have been confirmed as predators of the sweetpotato weevil in Indonesia. Although their role as predators of other sweetpotato pests is unknown, Pheidole ants are known to attack small prey stages such as eggs and early instar insect larvae.