The array of pests they need to counter is formidable, with food crops competing or attacked by:
Climate change is increasing the number of pests, with Africa amongst the most effected.
The International Livestock Research institute, in 2022, reported:
“Warming temperatures and shorter winters will make it easier for pests o spread into new regions and also allow them to reproduce more quickly and more often. Warming temperatures and changing rainfall patterns were a major impetus behind East Africa’s locust plagues of 2019. As the locusts spread across the region, they decimated crops and pastureland, leaving 13 million people at risk of severe food insecurity.” It predicts that “Africa will only be fulfilling 13 per cent of its food needs by 2050”, unless action is taken.
The urgent agenda for scientists focused on protecting crops is to increase plant health, resilience and yields as temperatures, pests, and extreme weather increase.
In Kenya, climate change has delivered waves of new and severe crop attacks from Maize Lethal Necrosis Disease (MNLD), Fall Armyworm (FAW), tuta absoluta (tomato leaf miner) for tomatoes, desert locust, Golden Apple Snails, False Codling Moth, the Papaya Mealy Bug, and many other surging pests. As a result, the number of Kenyans classified as severely food insecure is rising every year to now over 10 million people. The rise in pests and shifting climate have also led to surging food imports, which by 2019 topped 35% of the value of the country’s exports of goods, compared with just 15% in 2002.
To combat pests, and conserve moisture and resources on farms, scientists have developed: