• Ecophyto
  • Logo-Cirad
  • RITA
  • Logo-CA
  • FREDON
  • LPA-COCONI

Nezara viridula , etc.

Bugs

  

General

  • Biting-sucking insects belonging to the order Hemiptera, the suborder Heteroptera, the families Miridae, Pentatomidae, Coreoidea, etc.
  • Several species* affect tropical vegetables, causing symptoms that are often not very damaging, mainly on leaves and fruits.
    • Lygocoris pabulinus Linnaeus  
    • Equal spp.
    • Nesidiocoris tenuis Reuter
    • Nezara viridula (Linnaeus)
    • Dysdercus flavidus Signoret and D. fasciatus Signoret
    • Leptoglossus gonagra Fabricius
    • Anoplecnemis spp.
    • Halticus spp.
    • Cletus spp.
  • Observed in the open field and under shelter.

*Remember that bed bugs could be vectors of bacteria and yeasts presumed to be responsible for spoilage or even rotting of fruit once introduced into it.

  

  • Sensitive botanical family (s) *
Nezara viridula Solanacées Curcurbitaceae
     

Dysdercus flavidus/

fernal/fasciatus

Solanacées Curcurbitaceae
  Brassicas Malvaceae
     
Anoplecnemis  spp. Solanacées Cucurbits
  Brassicas  
     
Leptoglossus gonagra Solanacées Cucurbits
  Vegetables  
     
 Halticus  spp. Cucurbits Composed
  Brassicas Vegetables
     
Cletus  spp.  Malvaceae  
     
Hypselonotus fulvus  Malvaceae  
     
Microtechnites  sp.  Composed  Apiaceae
     
 Phthia  sp.  Solanacées  Cucurbits
   Vegetables  

 

 

  • Production area affected :
 Nezara viridula Mayotte Reunion
  New Caledonia French Polynesia
     
  Dysdercus flavidus/fernalis Mayotte    Guyana
     
 Halticus  spp.  Mayotte  
     
 Leptoglossus australis  Mayotte  French Polynesia
     
 Leptoglossus gonagra Reunion  Guyana
   New Caledonia  
     
Anoplecnemis  spp.  Mayotte  
     
Cletus  spp.  Mayotte  
     
Hypselonotus fulvus  Guyana  
     
 Microtechnites sp.  Guyana  
     
 Phthia  sp.  Guyana  

 

  • Organs attacked
Leaves Fruits Rods

 


Damage

  • Symptoms
    • Wilting of apex leaves (Figure 1).
    • Blisters on stems.
    • Tiny punctiform spots (Figure 2) on young fruits around which the coloring of the underlying tissues is lighter than the rest.
    • Larger, white to dark yellow spots on ripe fruit (Figures 3-8).
  • Signs : Presence of larvae and adults on the affected organs (figures 2, 10 to 15).
  • Possible confusion :

 


Biology 

  • Development cycle (figure 9): N. viridula goes through several stages: egg, 5 larval stages, adult. The length of its cycle (Figure 4) varies with temperature, from approximately 3 weeks at 30°C to 2 months at 20°C`.
    • Eggs, off-white, in the shape of small kegs grouped in honeycombs on the underside of the leaves.
    • Once the eggs hatch, larvae (Figures 12 to 14) dark red to black with white spots gradually disperse over the plants. Five larval stages follow one another, from the neonate larva which measures barely 1 mm to the old larva 1 cm long (figure 4-3), the last stage before the adult.
    • Adults (Figure 15) measuring 1.2 to 1.6 cm long by 0.8 cm wide. They are light green in color in summer and take on a purplish brown tint in autumn and winter. Provided with 2 pairs of wings, the first pair, called “hemelytron”, is thick and sclerified in its upper part.
  • Bug parasitizing many plants such as soybeans, rice, various vegetables (eggplant, cucumber, tomato, pepper, bean, etc.), as well as weeds which ensure its multiplication and serve as sources of infestation.
  • Dispersal : Mobile larvae and flying adults ensure the dissemination of these insects.
  • Limiting the use of broad-spectrum insecticides, following the development of integrated protection, seems to have contributed to the emergence of these bugs under shelter.

 


Protection

 Weed the greenhouse and its surroundings.

Last change : 04/28/22
Punaises-Concombre
Figure 1
Punaises-Tomate3
Figure 2
Punaises-Tomate7
Figure 3
Punaises-Tomate4
Figure 4
Punaises-Tomate1
Figure 5
Punaises-Tomate5
Figure 6
Punaises-Tomate2
Figure 7
Punaises-Tomate6
Figure 8
cycle_nezara
Figure 9
Punaise-Anoplocnemis
Figure 10
Punaise-Anoplocnemis2
Figure 11
Punaise-Nezara6
Figure 12
Nezara_viridula_L2_L3
Figure 13
Punaise-Nezara4
Figure 14
Punaise-Nezara3
Figure 15
leptoglossusadulte
Figure 16
dysdercus-adulte
Figure 17
halticus-adulte
Figure 18
punaise-adulte
Figure 19
nesidiocoris-adulte
Figure 20
Oeuf_Punaise
Figure 21
Phthia_Courge
Figure 22
Phthia_Courge
Figure 23
Microtechnites_Persil2
Figure 24
Microtechnites_Persil
Figure 25
Microtechnites_Degats_Persil
Figure 26
Microtechnites_Degat_Laitue
Figure 27
Hypselonotus_fulvus_Gombo
Figure 28