back to HYPP Zoology home page


.
Hoplocampa brevis (Klug)
Insecta, Hymenoptera, Tenthredinidae .

Pear sawfly, cherry sawfly

Description, Biology, Life Cycle, Damage, Common Names, Images


[R]Description
- Adult: 4 to 5 mm long, reddish-yellow. Legs yellow. Hyaline wings (*) .
- Eggs: 1 mm long.
- Larva: 8 to 12 mm long. Reddish-brown head, greyish-yellow body (*) .

[R]Biology
- Host plant: pear.
- Adult: feeds on pollen. Males are rare, reproduction is mainly parthenogenetic.
- Egg: time until hatching, 10 to 13 days.
- Larva: developmental duration, 20 days; 4 moults.

[R]Life Cycle
- 1 generation per year.
- The larva digs a gallery beneath the epidermis of the young fruit, at the base of the sepals which then wither. It then burrows towards the centre of the fruit and bites through the pips (primary attack). It leaves the fruit close to the calyx and attacks another (secondary attack), but rarely a 3rd. It then drops to the ground, burrows down a few cm and then spins a silken cocoon. It remains in diapause until February, and pupates in spring.
- The adult appears in late March to early April. The flight period is staggered over a period of 4 to 20 days. The female lays eggs in the flower buds at stage G (*) , making an oblique incision towards the centre of the calyx with the saw-like ovipositor and lays an egg beneath the epidermis between 2 sepals (*) .
- The egg swells and hatching often begins at stage G.

[R]Damage
Both primary and secondary attacks cause the fruits to fall prematurely (*) .


[R]Common Names
DE: Birnensägewespe ES: Hoplocampa del peral FR: Hoplocampe du poirier IT: Oplocampa delle perine PT: Hoplocampa das peras GB: Pear sawfly, Cherry sawfly

[R] Images

  1. Hoplocampa brevis (Klug) (Coutin R. / OPIE)
    Female In a Pear blossom.
  2. Hoplocampa brevis (Klug) (Coutin R. / OPIE)
    Egg and oviposition scar The laying cavity has been opened to show the egg (arrowed) in place under the epidermis.
  3. Hoplocampa brevis (Klug.) (Coutin R. / OPIE)
    Damage on pear fruitlet The attacked pear has been cut in half to show the larva (arrowed) in its cavity.
  4. Hoplocampa brevis (Klug) (Coutin R. / OPIE)
    Pear fruitlet attacked The frass (moist) is pushed to the surface (arrowed) by the larva.
    .

To read this page in French

HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.

back to HYPP Zoology home page