Cassava fruit fly

Anastrepha manihoti is a specialized insect pest belonging to the order Diptera and the family Tephritidae. As a significant agricultural pest, it primarily affects the cultivation of cassava, posing a threat to food security and economic stability in regions where this crop is a staple.

The primary host for this pest is cassava (Manihot esculenta). The fly larvae feed exclusively on the fruit and reproductive structures of the plant. Due to their internal feeding habit, these larvae are often shielded from direct topical chemical applications, making them a challenging pest to manage effectively in large-scale agricultural environments.

The life cycle of Anastrepha manihoti follows the standard holometabolous development of Tephritid flies: egg, larva, pupa, and adult. Females oviposit into the developing fruit. Upon hatching, the larvae consume the internal tissues, progressing through three larval instars before exiting the fruit to pupate within the soil or ground debris.

The damage caused by this pest leads to significant yield losses. Infested fruits often drop prematurely and exhibit signs of internal rot, often accelerated by secondary fungal or bacterial infections. This not only directly reduces the quantity of the harvested crop but also degrades the overall quality, rendering the fruits unfit for consumption or processing.

Integrated Pest Management (IPM) is essential for controlling Anastrepha manihoti:

• Deployment of pheromone traps to monitor adult flight patterns.
• Sanitation practices, such as the rapid removal and disposal of infested fallen fruits.
• Biological control using parasitoid wasps that target the larval stage.
• Targeted chemical control focusing on adult flies before they have the chance to oviposit in the fruit.