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Desert Locust Situation Update (9th October, 2020)

1. Desert Locust situation update

In Pakistan, the upsurge ended, and only small residual infestations remained over the coast of Labella & Karachi and along the eastern belt of Cholistan & Thar deserts (Courtesy: Food and Agriculture Organization of United Nations, Locust Watch, 5th October, 2020).

2. Impact of weather on Locust Growth

The seasonal precipitation is expected to remain below normal during October to December 2020, whereas the temperatures are expected to be above normals in most parts of the country.

Over the lower half of the country, the day temperatures are expected to remain around 30-35°C which may favor the egg and hopper development.

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 breeding/spread of locust.

Weather Based Locust Prediction Criteria

Parameters Threshold Outcome Remarks
Rainfall (mm) > 25 mm each in last two months Favorable for laying Eggs
  • The weather conditions in the recent weeks remained unfavorable for the development and growth of Locust in the lower half of the country.
  • As per seasonal prediction, there would be favorable environment for egg and hopper development particularly in the particular areas.
Air Temperature 20-35 °C Favorable for Egg and Hopper development
Soil Temperature (Shallow Depths) > 35 °C Generally, favorable for egg development
Wind Speed (Knots) <13.6 Knots for Adults
<19.4 Knots for swarm
  • Favorable for Adults to take off.
  • Favorable for Swarm to take off