Agriculture
Hungry bug seeks hot meal
Making the most of a meal
Fast-flying fungal spores
Amphibians
Toads
Salamanders
Tree Frogs
Animals
Jay Watch
Tool Use Comes Naturally to Crows
Sea Lilies on the Run
Behavior
Taking a Spill for Science
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Swine flu goes global
Birds
Lovebirds
Pheasants
Penguins
Chemistry and Materials
Flytrap Machine
Salt secrets
The chemistry of sleeplessness
Computers
Small but WISE
Fingerprint Evidence
The Earth-bound asteroid scientists saw coming
Dinosaurs and Fossils
Battling Mastodons
Mammals in the Shadow of Dinosaurs
Message in a dinosaur's teeth
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
Earth
Weird, new ant
A Volcano Wakes Up
Killer Space Rock Snuffed Out Ancient Life
Environment
The Wolf and the Cow
Giant snakes invading North America
Forests as a Tsunami Shield
Finding the Past
A Long Trek to Asia
Writing on eggshells
Stonehenge Settlement
Fish
Hagfish
Codfish
Flashlight Fishes
Food and Nutrition
Food for Life
The mercury in that tuna
In Search of the Perfect French Fry
GSAT English Rules
Who vs. Whom
Capitalization Rules
Pronouns
GSAT Exam Preparation Jamaica
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Exams Jamaica Scholarships
GSAT Scholarship
GSAT Exam Preparation
Results of GSAT are in schools this week
GSAT Mathematics
Detecting True Art
Play for Science
Monkeys Count
Human Body
Spit Power
Gut Microbes and Weight
Sleeping Soundly for a Longer Life
Invertebrates
Wasps
Squid
Cockroaches
Mammals
Sun Bear
Rabbits
Pekingese
Parents
The Surprising Meaning and Benefits of Nursery Rhymes
Raise a Lifelong Reader by Reading Aloud
Children and Media
Physics
The Pressure of Scuba Diving
Hold on to your stars, ladies and gentlemen
Dreams of Floating in Space
Plants
Surprise Visitor
Cactus Goo for Clean Water
Assembling the Tree of Life
Reptiles
Pythons
Iguanas
Caimans
Space and Astronomy
Asteroid Moons
A Planet from the Early Universe
Saturn's New Moons
Technology and Engineering
Riding Sunlight
Switchable Lenses Improve Vision
Algae Motors
The Parts of Speech
What is a Preposition?
What is a Noun
Adjectives and Adverbs
Transportation
Tinkering With the Basic Bike
Reach for the Sky
Robots on a Rocky Road
Weather
The solar system's biggest junkyard
The Best Defense Is a Good Snow Fence
Catching Some Rays
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™