- BMSB Injury
- Tarnished Plant Bug Injury
- Bacterial Spot
Fig. 1: BMSB Injury just prior to pit hardening. Note the bleeding and sunken spots.
Fig. 2: Native stink bug plant injury just prior to pit hardening. Note the shallow scarring.
If the BMSB injured area is cut one can see a brown mass of dead cells, not unlike cork spot of apple, that extends deep into the flesh (figure 3).
Fig. 3: BMSB Damage. Note the deep corky areas beneath the injury.
Physiological InjuryVarious physiological conditions can lead to bleeding that can be mistaken for insect injury. The distinction can be made by cutting into the fruit to determine whether or not the bleeding emanates from the pit or runs along beneath the surface (figure 4). Physiological injury will not be associated with any pattern of mouthpart entry. It will “wander” in an internal often random pattern, not be associated with corky tissue, and will usually start at an injured pit.
Tarnished Plant Bug (TPB) InjuryTPB injury is often less malforming than native stinkbug injury, especially if it occurs late in the spring or during the summer. Characteristic bleeding is present at first with later more inconspicuous scarring (figure 5).
Fig. 5: TPB Injury just prior to pit hardening. Note the bleeding and superficial scarring.
Bacterial SpotBacterial Spot symptoms also often start with bleeding. Water soaked areas can be seen about 3 weeks after infection that eventually darken causing deep pitting of the skin and flesh (figure 6).
Proper identification of injury is essential to choose a set of effective control measures, and can help to avoid costly and unnecessarily harsh tactics. If you are unsure of the cause of damage, extension personnel will happily try to identify it. Don’t hesitate to contact us!