Very few present and no mutual reaction occurring.
0-1 adult/400 m foot transect (or less than 25/ha.).
SCATTERED (SOME, LOW NUMBERS)
enough present for mutual reaction to be possible but no ground or basking groups seen:
1-20 adults/400 m foot transect (or 25-500/ha).
Forming ground and basking groups;
20+ adults/400 m foot transect (or 500+/ha).
ADULT SWARM AND HOPPER BAND SIZES
swarm: less than 1km2 * band: 1-25 m2
swarm: 1-10 km2 * band: 25-2,500 m2
swarm: 10-100 km2 * band: 2,500 m2-10 ha
swarm: 100-500 km2 * band: 10-50 ha
swarm: 500+ km2 * band: 50+ ha
1-20 mm of rainfall.
21-50 mm of rainfall.
more than 50 mm of rainfall.
OTHER REPORTING TERMS
the process of reproduction from copulation to fledging.
SUMMER RAINS AND BREEDING
July - September/October
WINTER RAINS AND BREEDING
October - January/February
SPRING RAINS AND BREEDING
February - June/July
a period characterized by breeding failure and/or successful control leading to the dissociation of swarming populations and the onset of recessions: can be regional or major.
a marked increase in locust numbers due to concentration, multiplication and gregarization which, unless checked, can lead to the formation of hopper bands and swarms.
a period following a recessions marked initially by a very large increase in locust numbers and contemporaneous outbreaks followed by the production of two or more successive seasons of transient-to-gregarious breeding in complimentary seasonal breeding areas in the same or neighboring Desert Locust regions.
a period of one or more years of widespread and heavy infestations, the majority of which occur as band or swarms. A major plague exists when two or more regions are affected simultaneously.
period without widespread and heavy infestations by swarms.
Period of deep recession marked by the complete absence of gregarious populations.
Calm: No threat to crops. Maintain regular surveys and monitoring.
Caution: Potential threat to crops. Increased vigilance is required: control operations may be needed.
Threat: Threat to crops. Survey and control operations must be undertaken.
Danger: Significant threat to crops. Intensive survey and control operations must be undertaken.
REGIONS OF LOCUST AFFECTED COUNTRIES
Locust-affected countries in West and North-West Africa: Algeria, Chad, Libya, Mali, Mauritania, Morocco, Niger, Senegal, and Tunisia; during plagues only: Burkina Faso, Cape Verde, Gambia, Guinea and Guinea-Bissau.
Locust-affected countries along the Red Sea; Djibouti, Egypt, Eritrea, Ethiopia, Oman, Saudi Arabia, Somalia, Sudan, Yemen: during plagues only: Bahrain , Iraq, Israel, Jordan, Kenya, Kuwait, Qatar, Syria, Tanzania, Turkey, UAE and Uganda.
Locust-affected countries in South-West Asia: Afghanistan, India, Iran and Pakistan.