Planet Earth

Like Waterloo for Chocolate

By Martha J HeilJul 1, 2000 12:00 AM

Newsletter

Sign up for our email newsletter for the latest science news
 

Could the day come when the only chocolate bars are in museums? South America's cacao growers are warily watching the spread of witches'-broom fungus, which infects seed pods and sends out evil-looking orange shoots. It has slashed Brazil’s cocoa production by more than 25 percent in the past five years.

Crowded cacao plantations encourage the rapid spread of the witches'-broom fungus, and fungicides don't work well amid the heavy rains of the tropics. Robert Lumsden of the U.S. Agricultural Research Service in Beltsville, Maryland, is leading an effort to fight fungus with fungus—Trichoderma, which attacks witches'-broom and other cacao pests. Field trials in Peru and Brazil show that Trichoderma fungi are effective and harmless to the trees. But the genetic uniformity of commercial cacao groves still leaves them vulnerable to future attacks.

Scott Bauer

1 free article left
Want More? Get unlimited access for as low as $1.99/month

Already a subscriber?

Register or Log In

1 free articleSubscribe
Discover Magazine Logo
Want more?

Keep reading for as low as $1.99!

Subscribe

Already a subscriber?

Register or Log In

More From Discover
Recommendations From Our Store
Shop Now
Stay Curious
Join
Our List

Sign up for our weekly science updates.

 
Subscribe
To The Magazine

Save up to 70% off the cover price when you subscribe to Discover magazine.

Copyright © 2021 Kalmbach Media Co.