Walnut insects A Lecture To ToT trainees ( FFS) By Mr. Allah Dad Khan Provincial Coordinator IPM KPK MINFAL Pakistan

2. Walnut Injurious Insects
A
Lecture To ToT trainees (
FFS)
By
Mr. Allah Dad Khan
Provincial Coordinator IPM
KPK
MINFAL Pakistan

3. Aphids
Damage
Walnut
Aphids
 Scientific names: Walnut
aphid:Chromaphis
juglandicola
Dusky-veined
aphid: Callaphis juglandis
 DAMAGE
 Aphid feeding can reduce tree
vigor and nut size, yield, and
quality. Aphids excrete
honeydew. Sooty mold growing
on the honeydew turns the husk
surface black, and increases
the chance for sunburn on
exposed nuts. High populations
of aphids may lead to leaf drop,
exposing more nuts to sunburn,
which darkens or shrivels the
kernels

4. Codling Moth
DAMAGE
CM
 The damage caused by the
codling moth is different with
each generation. First-
generation larvae reduce yield
directly by causing nutlets to
drop from the tree. Codling
moth-damaged nutlets have
frass at the blossom end. Be
careful not to confuse nuts
damaged by codling moths with
unpollinated nutlets or with
blight-infected nutlets, which
have dark lesions but no frass
and drop at the same time.
Damage is generally most
severe on early-season
cultivars, although it has been
increasing steadily over the
years on late-season cultivars
such as Chandler
 Walnut
 Codling Moth
 Scientific
Name:Cydia
pomonella

5. Codling Moth
Crop damaged by
codling moth
Codling moth larvae
infesting walnut.

6. Husk Fly
Husk Fly Maggot
Damage Walnut Husk Fly

7. Sanjose Scale
Walnut twig infested with
walnut scale, Diaspidiotus
juglans-regiae
San Jose scale and the covering
of a mature female with a parasite
exit hole