Podsucking bug

Riptortus serripes

Overview:

Riptortus serripes, commonly known as the Soybean Pod Borer or the Soybean Pod Bug, is a species of stink bug that can be a significant pest in soybean crops. This insect is part of the family Alydidae, which includes various plant-feeding bugs.

Detailed Appearance:

  • Adult Soybean Pod Borers are typically brown with distinctive markings.
  • They have a shield-shaped body characteristic of stink bugs.
  • The name "serripes" refers to the serrated edges on the pronotum (the shield-like plate covering the thorax).
  • The nymphs (immature stages) resemble smaller versions of the adults but lack wings.

Life Cycle:

  • The life cycle of Riptortus serripes includes egg, nymph, and adult stages.
  • Eggs are laid on soybean plants, and nymphs hatch from these eggs.
  • Nymphs go through several molts before reaching adulthood.
  • Adults feed on soybean pods and seeds, causing damage.

Identification of Crop Infestation:

  • Presence of stink bugs on soybean plants, particularly on pods.
  • Damage to soybean pods caused by feeding, leading to seed loss and reduced quality.
  • Nymphs may be found on various plant parts.

Management Strategies:

  • Cultural Controls:

    • Use crop rotation to disrupt the life cycle and reduce pest pressure.
    • Remove and destroy crop residues after harvest.

  • Biological Controls:

    • Encourage natural enemies such as parasitoid wasps and predators like spiders.
    • Conservation of natural predators helps regulate Soybean Pod Borer populations.

  • Chemical Controls:

    • Apply insecticides labeled for stink bug control when populations exceed economic thresholds.
    • Timing is crucial, and applications may target nymphs and adults.

  • Monitoring:

    • Regularly monitor soybean fields for the presence of Soybean Pod Borers.
    • Use pheromone traps to detect adult activity.

  • Resistant Varieties:

    • Consider planting soybean varieties that exhibit resistance or tolerance to stink bugs.
    • Resistant plants can help reduce the impact of infestations.

Integrated pest management (IPM) practices that combine various control methods are often the most effective strategy for managing Soybean Pod Borers. Tailor your approach based on local conditions, crop growth stage, and pest population levels. For specific recommendations and the latest information, it's advisable to consult with local agricultural extension services or entomologists.