What crop-ravaging swarms can contain 10 billion individuals and cover 400 square miles?
Image by USDAgov
Cover crop on a resting farm field at Leafy Greens, operated by farmer Tom Heess, in the Salinas Valley, California on Thursday, June 16, 2011. Leafy Greens grows row crops of lettuce, broccoli, cauliflower sweet peas and seed beans. He uses rotational crop plantings to control weeds and plant disease. When a plot of land is at rest, he plants a cover crop of barley and rye grass because the roots hold the topsoil reducing erosion of the soil. He is converting his irrigation system from conventional sprinklers to micro irrigation. Where one system produces runoff and erosion of the soil; the other has little or no erosion, less maintenance, easy harvest and less water is needed. When seasonal rains produce runoff, the silt that flows with it is caught in sediment ponds. The ponds have grass, bushes and trees to hold the structure and allow the silt to settle. Spillways lead to holding ponds and eventually the Salinas River, a tributary of the Monterey Bay National Marine Sanctuary. So far, because of its design and efficiency, no water has made it to the river. USDA Photo by Lance Cheung.
Question by Rakiea: What crop-ravaging swarms can contain 10 billion individuals and cover 400 square miles?
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12 Responses to What crop-ravaging swarms can contain 10 billion individuals and cover 400 square miles?
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Locusts
bueko
December 10, 2011 at 11:00 am
Locusts.
_DestroyingAngel_
December 10, 2011 at 11:17 am
Locusts!
Jerrysberries
December 10, 2011 at 12:10 pm
Math-hating locusts!
benoit3535
December 10, 2011 at 12:26 pm
locusts
TK
December 10, 2011 at 1:13 pm
locusts
stifler1787
December 10, 2011 at 1:30 pm
Locusts
cookie78monster
December 10, 2011 at 1:43 pm
locusts
darkdragun05
December 10, 2011 at 2:39 pm
Locusts
triviacalifornia
December 10, 2011 at 3:39 pm
locusts
jmac_598
December 10, 2011 at 4:21 pm
Locusts is the answer to the radio trivia
kameo_44
December 10, 2011 at 5:10 pm
locusts
angelgrl983
December 10, 2011 at 5:34 pm