BMSB on pistachio, and survival on crops common in the SJV

This material is based upon work that is supported by the National Institute of Food and Agriculture, U.S.

Department of Agriculture, Specialty Crop Research Initiative under award number 2016 -51181-25409.

Judith M. Stahl and Kent M. Daane

UC Berkeley

Pistachio production in California

• USA after Iran 2nd biggest producer

• 98% of US pistachio production in CA

• More than 250.000 bearing acres

• And growing: estimated 350.000 by 2023

Native stink bugs in pistachio

0

0.5

1

1.5

2

2.5

31. May 14. Jun 24. Jun 17. Jul 30. Jul 23. Aug

Stin

k b

ugs

per

sam

ple

(m

ean

±SE

)

canopy

ground

Native stink bugs in pistachio

Halyomorpha halys seems to cause epicarp lesions like native species

Photo: Tim Haye Photo: Odaguides.us Photo: Natash Wright

Halyomorpha halys can cause more epicarp lesions than native species

Photo: Tim Haye Photo: Odaguides.us Photo: Natash Wright

Halyomorpha halys can cause more epicarp lesions than native species

Photo: Tim Haye Photo: Odaguides.us Photo: Natash Wright

Halyomorpha halys can cause more epicarp lesions than native species

Photo: Tim Haye Photo: Odaguides.us Photo: Natash Wright

Halyomorpha halys can cause more epicarp lesions than native species

Photo: Tim Haye Photo: Odaguides.us Photo: Natash Wright

Halyomorpha halys can cause more epicarp lesions than native species

But: No increase in kernel necrosis due to H. halys feeding

Photo: Tim Haye Photo: Odaguides.us

H. halys L. zonatusC. hilariscontrol

aa

a

b

Kern

el n

ecro

sis

per

clus

ter

in 2

018

and

201

9

2

4

6

8

10

Photo: Natash Wright

ab a

bc

c

ab

bcbc

ab

a

c

0

20

40

60

80

100

almond peach pistachio grape poly field

Mo

rtal

ity

[%]

1st instar

2nd instar

3rd instar

4th instar

5th instar

adult

H. halys field survival on Californian crops is low

ab a

bc

c

ab

bcbc

ab

a

c

0

20

40

60

80

100

almond peach pistachio grape poly field

Mo

rtal

ity

[%]

1st instar

2nd instar

3rd instar

4th instar

5th instar

adult

H. halys field survival on Californian crops is low

ab a ab b ab

nymph

Mortality

≥ 85%

California pistachio production potentially at risk,

but currently low concern because of low population densities

• Halyomorpha halys can cause more external damage on pistachios than native species

• H. halys does not cause more internal pistachio damage

• High nymphal mortality might help keep population sizes down

To conclude…

Acknowledgements

Sunny Yang and Garrett Morales

Alonzo Ledesma Thomas De Schepper Ethan Ramos

Davide Scaccini Houston Wilson and lab

Warren H. L. Wong

Thank you!