Agriculture
Watering the Air
Earth-Friendly Fabrics
Seeds of the Future
Amphibians
Salamanders and Newts
Poison Dart Frogs
Bullfrogs
Animals
Little Bee Brains That Could
The Secret Lives of Grizzlies
Putting a Mouse on Pause
Behavior
The Disappearing Newspaper
Monkeys in the Mirror
Body clocks
Birds
Robins
Hawks
Tropical Birds
Chemistry and Materials
Fog Buster
Flytrap Machine
Batteries built by Viruses
Computers
It's a Small E-mail World After All
Batteries built by Viruses
Electronic Paper Turns a Page
Dinosaurs and Fossils
Some Dinos Dined on Grass
Ancient Critter Caught Shedding Its Skin
Dino-Dining Dinosaurs
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Distant Quake Changes Geyser Eruptions
The Rise of Yellowstone
Pollution at the ends of the Earth
Environment
Giant snakes invading North America
Forests as a Tsunami Shield
What is groundwater
Finding the Past
A Plankhouse Past
Stone Age Sole Survivors
Untangling Human Origins
Fish
Nurse Sharks
Lampreys
Cleaning Up Fish Farms
Food and Nutrition
Food for Life
The Essence of Celery
Sponges' secret weapon
GSAT English Rules
Who vs. Whom
Problems with Prepositions
Pronouns
GSAT Exam Preparation Jamaica
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
Mastering The GSAT Exam
GSAT Scholarship
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
GSAT Scholarship
Results of GSAT are in schools this week
GSAT Mathematics
Play for Science
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Monkeys Count
Human Body
Smiles Turn Away Colds
The tell-tale bacteria
Speedy Gene Gives Runners a Boost
Invertebrates
Horseshoe Crabs
Black Widow spiders
Ticks
Mammals
Domestic Shorthairs
Persian Cats
Goats
Parents
Children and Media
Expert report highlights the importance to parents of reading to children!
Raise a Lifelong Reader by Reading Aloud
Physics
Speedy stars
The Pressure of Scuba Diving
Einstein's Skateboard
Plants
When Fungi and Algae Marry
Making the most of a meal
Cactus Goo for Clean Water
Reptiles
Black Mamba
Pythons
Iguanas
Space and Astronomy
Holes in Martian moon mystery
Wrong-way planets do gymnastics
A Dead Star's Dusty Ring
Technology and Engineering
Roll-Up Computer Monitors to Go
Supersuits for Superheroes
Spinach Power for Solar Cells
The Parts of Speech
Pronouns
What is a Verb?
What is a Preposition?
Transportation
Charged cars that would charge
Are Propellers Fin-ished?
Middle school science adventures
Weather
Recipe for a Hurricane
A Dire Shortage of Water
Either Martians or Mars has gas
Add your Article

Keeping Bugs Away from Food

You’re always supposed to stand far away from food when applying bug spray. That’s because many bug repellents contain dangerous chemicals that can make you sick if you eat them by mistake.

Keeping bugs away from your body, however, is only half the battle of enjoying a relaxing picnic. How are you supposed to keep the bugs away from your food?

Scientists from New Zealand may have a solution. They’ve made cardboard food cartons coated with a substance called citronella oil, which is extracted from grass.

Perfumes, candles, and some bug repellents already contain the strong-smelling stuff. And past research has shown that bugs avoid the stink of citronella, along with the smells of other plant extracts, such as garlic and pine needles.

To find the best formula, the researchers first made a bunch of cartons out of cardboard. Then they treated each box with one of five, bug-repelling plant extracts. They also left a few boxes untreated. Finally, they let loose hundreds of red flour beetles.

Over a number of trials, the beetles avoided the citronella-treated boxes more than any of the others. Further tests showed half as many beetles entered the citronella boxes as entered the untreated boxes.

The effect may be promising, but it’s not permanent. After about 8 months, the citronella loses its punch. By then, however, the picnic should be long over.

Even though citronella comes from grass, it’s not a good idea to coat your food or even your food containers with it just yet. Scientists still have to show that citronella-treated cartons are safe for people.—E. Sohn

Keeping Bugs Away from Food
Keeping Bugs Away from Food








Designed and Powered by HBJamaica.com™