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Desert Locust Situation (Update)

Parameters Threshold Remarks
Rainfall (mm) > 25 mm each in last two months Favorable for laying Eggs
Air Temperature 20-35 °C Favorable for Egg and Hopper development
Soil Temperature (Shallow Depths) > 35 °C Unfavorable; Eggs may die
Wind Speed (Knots) <13.6 Knots for Adults and <19.4 Knots for Swarm to take off Favorable for Adults to take off. Favorable for Swarm to take off

1. Desert Locust situation update

Mature adult groups laying eggs in Khyber Pakhtunkhwa (Dera Ismail Khan, Lucky Marwat) and Baluchistan (Dalbandin, Kharan, Khuzdar, Washtuk, Turbat) that will hatch during the second half of March and form hopper groups and small bands. New generation immature groups and small swarms are likely to start forming in Baluchistan by the end of March. (Courtesy: Food and Agriculture Organization of United Nations, Locust Watch, 10 March 2020)

2. Impact of weather on Locust Growth

Tropical type weather is most favorable for locust growth. Deserts with cool nights and warms days provide conducive environment for the growth of locust.

Light to moderate rains with normal day temperatures are expected from mid of March up to 1st week of April 2020, so there is a risk of spread of locust in more areas of Punjab and Lower KP in addition to Balochistan province.

3. Precautionary Measures

Widespread and Appropriate insecticides spray using aero planes/helicopters or special vehicles in the affected areas, is the only solution to control the spread of locust.