Crop Protection Flashcards
Biblical records of 10 plagues, what is the three involved insects?
Locust, lice, flies
Honeybee and honey extraction in what year?
Egypt -2600 B.C
Silk worm for silk production
China-4700 B.C
Early reference to pesticide use dates back to 1000 B.C when Homer recommended the use of ?
Pest averting sulfur
What is the insect transmitting disease that killed 1/3 of the population of Europe.
Black or Bubonic Plaque
The disease is caused by a bacterium transmitted by a rat flea called ?
Xenopsylla cheopsis
Physical puncturing or breaking the seed coat of hard shelled seeds.
Mechanical- abrasion, pricking,nipping and dehulling of seeds.
Chemical - treatment with sulfuric acid .
Scarification
Exposure or subjecting the seeds to extremely low temperature.
Stratification
The cotyledons remain below the soil while the plumule pushes upward and emerge above the ground. Example: Monocots
Hypogeal germination
The cotyledons are raised or carried above the soil where they continue to provide nutritive support to the growing embryo. Example: dicots
Epigeal germination
Aims at only putting down the weeds present by some kind of physical or chemical means.
Weed control
Is a system approach whereby whole land use planning is done in advance to minimize the very invasion of weeds in aggressive forms and give crop plants a strongly competitive advantage over the weeds .
Weed management
This method aims to destroy weeds by cutting and removing or by dessication and exhaustion of weeds by several methods. Examples : hand hoeing, hand pulling , tillage , flooding,burning, mulching by non-living materials .
Mechanical methods
Jumping
Saltatorial
Digging
Possorial
