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

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

3. Symptoms Oriental fruit moth larva
inside peach
 Wilting shoot tips ("flagging") caused by insect
feeding; insect frass may be visible around entry
holes burrows in fruit which cause the fruit to be
soft, mushy and discolored; adult insect is a
small gray moth; larvae are initially white with a
black head but turn pink with a brown head as
they mature
 Cause
 Insect
 Comments
 Orietal fruit moths overwinter as mature larvae
inside protective cocoons in protected areas of
trees or in leaf debris on the ground; insect may
undergo six or more generations per year
 Management
 Management of the oriental fruit moth usually
involves the application of insecticides or the use
of mating disruptants; commercial growers
should monitor moth numbers using pheromone
traps and apply insecticide if average number of
moths exceeds 10 per trap; chemical sprays
should not be applied within 14 days of harvest
Oriental fruit moth
Grapholitha molesta

4. Flagging caused by oriental
fruit moth strike
Oriental fruit moth larva and
damge to shoot tip
Oriental fruit moth

5. Symptoms Damage to fruit caused by
San Jose scale
 Scale insects cause damage by feeding on twigs, branches
and fruit on peach trees, injecting toxins into the plant as
they do so; if the infestation is heavy, gumming may occur
on the bark and twigs or entire branches can be killed;
insects are flattened discs, or "scales" with no visible legs;
scales produce a white waxy coating which eventually
turns black (black cap stage)
 Cause
 Insect
 Comments
 Scale insects overwinter in the black cap stage; winged
adult males mate with females which retain their eggs
inside the body until they hatch
 Management
 Populations are often kept in check by natural enemies,
including predacious beetles and some wasps - although
broad-spectrum insecticides may result in outbreaks of
scale by killing off populations of beneficial insects; peach
trees can be sprayed with horticultural oils when dormant
which effectively kill scales without damaging natural
enemies

Pseudaulacaspis pentagona
Quadraspidiotus perniciosus

6. White peach scale on peach
branch White peach scale infestation
Scale

7. Damage to fruit caused by
San Jose scale White peach scale infestation
Scale

8. Codling Moth (Cydia pomonella)
 Codling moth (Order Lepidoptera, Family Tortricidae) is the most serious pest
of apple and pear worldwide (Fig. 1). In most commercial fruit producing
regions and home yards in Utah, fruit must be protected to harvest a crop.
Insecticides are the main control tactic. There are new insecticides available,
many of which are less toxic to humans and beneficial insects and mites than
earlier insecticides. For commercial orchards with more than 10 acres of
contiguous apple and pear plantings, pheromone-based mating disruption can
greatly reduce codling moth populations to allow reduced insecticide use

9. (Fig. 1) Codling moth adult (Fig. 2) Codling moth larva
Codling Moth

10. Symptoms
(Fig. 1) Young peach twig
borer larva on peach
 Peach twig borer (Anarsia lineatella) is found
worldwide wherever stone fruits are grown. In
Utah, it is a significant pest on peach, nectarine,
and apricot. There are typically three generations
of peach twig borer in northern Utah (May-June,
July, and August-September) and four or more
in southern Utah. Young larvae (Fig. 1) that have
overwintered emerge from protected shelters on
limbs and twigs during bloom to petal-fall and
burrow into developing shoots (Fig. 2). When
populations are high, spring larval feeding can
cause substantial damage to trees. The first
adults are usually detected during April in
southern Utah and May in northern Utah.
Economic yield loss occurs during the summer
when larvae of subsequent generations attack the
fruit (Fig. 3). Insecticides are currently the most
effective control tactic. Lower toxicity
insecticides such as microbial products (Bacillus
thuringiensis and spinosad) and insect growth
regulators (methoxyfenozide, diflubenzuron, and
others) can provide excellent control when timed
with early larval feeding and egg hatch.
Peach Twig Borer

11. Fig. 1) Adult prionus root borer, female (left) with
ovipositor extended, and male (right) with larger
antennae for detecting female sex pheromone.
 Prionus root borers belong to
a family of beetles (Order
Coleoptera) commonly known
as long-horned beetles
(Cerambycidae). The larvae
are often referred to as round-
headed borers because their
body shape is cylindrical.
 Several species in the Prionus
genus are large, root-boring
beetles, and they are widely
distributed
Prionus Root Borer (Prionus californicus)

12. Larvae
 (Fig. 2) Prionus larvae of various ages, ¾ - 4¼
inches long.