Arthropod Pests of Pomegranate and Insights

into Management

Walt Bentley

Arthropods Found in California

Ants (Grey field, Argentine, Southern fire)

Cotton Aphid

Cherry Leafhopper

Citrus Flatmite

False Chinch Bug

Filbertworm

Katydid

Leafooted Plant bug

Grape mealybug

Navel orangeworm and Carob moth

Omnivorous leafrooler

Soft scales

Ash Whitefly

Monitoring and Thresholds

Monitoring based on other crops

Mealybug,Katydid, Omnivorous leafroller, Leaffooted plant bug, Navel orangeworm

Virtually no treatment thresholds

Again based on other crops

Important aspect is whether the crop is sold fresh or juice!

Management Strategies

Biological

Cultural/Physical

Santitaion

Pruning

Chemical

Insecticides

Bacillus thuringiensis (Dipel, Javelin, Deliver)

Methomyl (Lannate)

Success/Entrust

Neem (Trilogy)

Azadirachtin

Pyrethrum (Pyganic, Evergreen)

Buprofezin (Applaud

Sulfur (Dust and wettable

Imidacloprid (Provado, Admire)

Omnivorous

Leafroller

Omnivorous Leafroller

Omnivorous Leafroller Seasonal Flight

0

20

40

60

80

100

120

140

160

3/153/29

4/124/26

5/105/24

6/76/21

7/57/19

8/28/16

8/309/13

9/27

Mot

hs/

trap

/wee

k

Katydid Damage

Grape Mealybug

Grape Mealybug

Seasonal development of grape mealybug in California’s San Joaquin Valley

JanuaryDecember

November

October

September

August May

February

March

April

JuneJuly

Eggs and

1st within

sacs , much

mortality

Eggs and

1s t crawlers

within sacs

Eggs and

1st

crawler

within

sacs

Eggs and

1st

crawlers

within

sacsEggs and

1st

crawlers

1st moving,

some eggs ,

2nd instar

1st and 2nd ins tar,

male cocoons ,

females maturing

Mature females

and males Females

at cane

base

with

eggs

All

immature

s tages ,

bunch

infes tation,

males late

Heavy

infes tation,

males ,

females, eggs

All immatures on

bunches and wood,

old females dying

Under Bark

Bud Break

Bloom

Movement to

Base canes

Mealybug Development

The Arthropod Players

Formica aerata

Pseudococcus maritimus

Ascerophagus notativentis

False Chinch Bug

False Chinch Bug Habitat

Cotton/Melon Aphid

Ash

Whitefly

Leaffooted Plant Bug

Flat Mite

Navel

Orangeworm

Sources of NOW

Relationship Between NOW Egg Deposition and Infestation, Wasco, CA

0.3

19.2

4.5

4.8

0.5

0

5

10

15

20

25

4-Apr

15-A

pr

27-A

pr

11-M

ay

20-M

ay

31-M

ay

10-J

un

21-J

un1-

Jul

12-J

ul

22-J

ul

2-Aug

16-A

ug

26-A

ug

5-Sep

16-S

ep

26-S

ep

Eg

gs/t

rap

0

2

4

6

8

10

12

14

16

18

% I

nfe

ste

d (

50

0)

Filbert Worm

Soft Scal

e