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Message Area
Sci / Health / Environment

Enviro. June 01 '05 Locusts

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#1 of 2

     Posted 6/2/05 3:13 AM   
Sue_N
 
From  Sue_N  Posts 3452  Last 12:11 AM
To  All      [Msg # 197180.1 ]    

Which do you think is the best way to control locusts? Would you eat them?

Locusts

Locusts are insects from the same order of insects as grasshoppers, katydids and crickets. They look like grasshoppers but behave differently. When there are a lot of locusts, they form the dense swarms which migrate long distances and devastate crops, eating several tonnes of plant material every day.

Unlike butterflies and moths, locusts do not go through a pupa stage; just egg, nymph (hopper) and adult. The female drills a hole in the ground and deposits a 'pod' of eggs and seals it with froth, either after rain or after migration. The nymph goes through 5 moults. Nymphs and adults need the green vegetation that comes with rainfall to survive.

Locusts have a variety of parasites and predators. Tiny wasps may kill the eggs. Flies may kill the nymphs and reduce the fertility of adults or kill them. Locusts in damp areas also suffer from nematodes. Birds, mammals and insects also eat locusts but do not make much of a dent in a swarm.

Authorities monitor locust populations by doing ground surveys in known major breeding areas. Light traps may be used to monitor locusts flying at night. Forecasts are also made by integrating knowledge of locust behaviour with weather information and forecasts.

Locust swarms are sprayed from the air with insecticides (such as an organophosphorous insecticide or a phenyl pyrazole), with due care being taken where possible to avoid reservoirs, homes, vehicles, beehives or the crops that they are pollinating. Fungal spores harmful to locusts, suspended in a mineral or vegetable oil, may also be sprayed.

People in poor areas may have to use tactics such as fire (smoke), water or sticks to try and protect their crops.

Recent news stories involving locusts include:

Algeria says battling new locust invasion

Swarms of locusts seen in the Sahara desert have given rise to fears of a new attack on crops by the insects. Last year Algeria spent $225.3 million on spraying and other measures.

Please see the following message for the remaining stories.

Sue [sysop in NewsForum, World Issues, All Animals forums]
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#2 of 2

     Posted 6/2/05 3:17 AM   
Sue_N
 
From  Sue_N  Posts 3452  Last 12:11 AM
To  All      [Msg # 197180.2 Message 197180.2 replying to 197180.1 197180.1 ]    

Other Stories

Fla. OKs Deal to Avert Drilling Off Coast

Coastal Petroleum, which held an offshore drilling lease the state issued in the 1940s, was awarded $12.5 million by Gov. Jeb Bush and the Cabinet for not being allowed to drill for oil. The state banned offshore drilling in 1990.

France launches drive to boost organic food sales

France has launched a national campaign to promote organic produce with 10 days of events. France's interest in organic food lags behind that of other countries in Europe.

Short-necked dinosaur challenges accepted theory

An adult dicraeosaurid dinosaur skeleton found in Patagonia bucked the trend for long necks. Its neck was relatively short for its relatively small 10 meters (yards) length.

20,000 Bees Infest Okla. Family's Home

20,000 bees were living under the floorboards of a 1930's home which comes under the Tulsa Historic Preservation District guidelines.

Paradise lost: tsunami crushes age-old Indian tribe

The Nicobarese have been so traumatised by the tsunami that they are abandoning their way of life on their island's shores and are turning to drink. They have stopped fishing and barely started to replace their coconut plantations, which will take 10 years to mature. Government camps are based around nuclear families rather than the extended families of Nicobarese society.

One-fifth of Earth's bird species in danger

BirdLife International's annual assessment of birds listed 1,212 as threatened with extinction, with the situation worsening apart from a few successes.

U.S. bars Mexico's Chiapas, Durango cattle

Tuberculosis tests will be required on cattle from 11 other Mexican states and zones before they could be imported into the U.S.

Bird Flu Said Not Behind Chicken Illness

Avian flu has been ruled out as the cause of a fatal epidemic that resulted in 17,000 chickens being slaughtered in Jaraguari, Brazil.

Indian scientists to study tsunami-volcano link

Indian geologists plan to study lava samples from a volcano on Barren Island in the Bay of Bengal to determine whether its recent eruption is linked to the earthquake that triggered the December 26 2004 tsunami.

Mild earthquakes shake Tokyo, no injuries

Tokyo was shaken by a series of earthquakes of magnitudes ranging between 3.7 and 4.2. No damage, injuries or tsunami were reported.

China floods leave 200 dead, missing-resident

At least 200 people are dead or missing in southern China after torrential rain caused flood and mudslides. Over 10,000 people are homeless.

Large Calcite Formation Found in N.M. Cave

Scientists have announced their discovery of a more than two mile-long rare calcite formation, dubbed Snowy River, starting from Fort Stanton Cave in southern New Mexico. It will not be open to the public and scientists are going to great lengths not to contaminate it. They hope to learn a lot from it, including from specialized bacteria which may have pharmaceutical applications.


Which do you think is the best way to control locusts? Would you eat them?

[Views expressed are those of the author(s) and do not necessarily reflect those of CompuServe, Netscape, any government, agency, or news organization. External Websites are "At Your Own Risk," and no endorsement is expressed or implied.]

Sue [sysop in NewsForum, World Issues, All Animals forums]
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Sci / Health / Environment

Enviro. June 01 '05 Locusts

  
 
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