[Structural changes in the gypsy moth (Ocneria dispar L.) hemogram in polyhedrosis]

Area of Science:

• Entomology
• Insect Pathology
• Cell Biology

Background:

• Gypsy moth populations exhibit cyclical quantity increases.
• Hemocyte populations and functions are crucial for insect immune response.
• Understanding hemogram changes during population phases is vital for pest management.

Purpose of the Study:

• To investigate structural changes in Gypsy moth larvae hemograms during population increase.
• To analyze hemocyte counts and cytochemical properties.
• To identify potential viral influences on hemocytes.

Main Methods:

• Morphometric analysis of hemocyte populations.
• Cytochemical staining for phenol oxidase activity.
• Nitroblue tetrazolium reduction assays.
• Electron microscopy for viral observation.

Main Results:

• Increased counts of granulocytes and prohemocytes were observed.
• Elevated levels of hemocytes with phenol oxidase activity.
• Increased numbers of hemocytes reducing nitroblue tetrazolium.
• Atypical virus morphogenesis was detected within hemocytes.

Conclusions:

• Population increase in Gypsy moths is associated with significant hemogram alterations.
• Enhanced immune-related hemocyte activities suggest a response to environmental factors or pathogens.
• The presence of atypical virus morphogenesis may indicate a viral infection impacting larval health during population outbreaks.