Locust Phases | Directorate of Plant Protection, Quarantine & Storage | GOI

Locust Phases

Locust Phases
Characteristics Solitary phase Gregarious phase
Behavior -Do not form groups or swarms
-Roost, bask, feed and move as individuals
-Hoppers move short distance, adults fly as individuals at night
-Form persistent and cohesive groups, bands and swarm
-Roost, bask, feed and move together
-Very mobile, fly as swarms by day. Hoppers move in band.
Colour -Hoppers uniformly green in early instars but may be brown in last two instars.
-Adult pale grayish brown, buffer peach coloured. Males change to pale yellow on sexual maturation.
-Female show no colour change on maturation at low density.
-Hoppers have black pattern on yellow or orange background
-Adults rosy pink on fledging, darkens with age to grayish or brownish red then to yellow on sexual maturation. Males are brighter.
Morphometrics F/C Male 3.75 and above
Female 3.85 and above
E/F Male 2.025 or below
Female 2.075 or below
F/C Male 3.15 or below
Female same as above
E/F Male 2.225 and above
Female 2.272 and above
Note: C = Width of head, E = Length of forewing, F = Length of hind femur, measuring Unit in milimetre

Breeding Season:

In all, there are three breeding seasons for locusts (i) Winter breeding [November to December], (ii) Spring breeding [January to June] and (iii) Summer breeding [July to October].

India has only one locust breeding season and that is Summer breeding. The neighboring country Pakistan has both spring and summer breeding.

In India, the scheme Locust Control and Research (LC&R) is responsible for control of Desert Locust and is being implemented through Organisation known as “Locust Warning Organisation (LWO)” established in 1939 and later amalgamated with the Directorate of Plant Protection Quarantine and Storage in 1946. Locust Warning organization (LWO) is responsible to monitor and control the locust situation in Scheduled Desert Area (SDA) mainly in the States of Rajasthan and Gujarat while partly in the States of Punjab and Haryana by way of intensive survey , surveillance, monitoring and control operations where required.

Locust Phases