insect management for peppers
TRANSCRIPT
Bill Chaney Insect Management for Pepper 1/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
April 7, 2005
Insect Management for Peppers
William E. ChaneyFarm Advisor - EntomologyU.C. Cooperative Extension
1432 Abbott StreetSalinas, CA 939011
Insect Management for PeppersAphidsThrips
PsyllidsSymphylans
Others2
Bill Chaney Insect Management for Pepper 2/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Insect Management for Peppers
Aphids
Green Peach Aphid
3
Insect Management for PeppersAphids
Damage:HoneydewViruses
ManagementInsecticidesWeed ControlBiological Control4
Bill Chaney Insect Management for Pepper 3/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Insect Management for PeppersAphids
Management by insecticides is usually not successful in preventing virus transmission.
It may be helpful in slowing the in-field spread of these viruses.
5
Insect Management for Peppers
Thrips
Western Flower ThripsOnion Thrips
6
Bill Chaney Insect Management for Pepper 4/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Insect Management for Peppers
ThripsDamage:
ScaringTomato Spotted Wilt
ManagementInsecticidesWeed Control
7
Insect Management for Peppers
ThripsManagement by insecticides is usually not successful in preventing virus transmission.
It may be helpful in slowing the in-field spread of these viruses.
8
Bill Chaney Insect Management for Pepper 7/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Potato Psyllid
Egg: 3 to 9 days
Nymphs: five instars - 12 to 21 days
Adult Females: lay up to 1000 eggs
over about 3 weeks
Optimum Temperature range: 60 to 90 deg F
Lethal temp: 104 deg F -eggs and nymphs
13
Potato Psyllid
"psyllid yellows”
honeydew
14
Bill Chaney Insect Management for Pepper 8/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Damage symptoms (tomato)
• Psyllid yellow from salavary toxin:Reduces levels of nitrogen;Inhibition of material translocation; Smaller and distorted chloroplasts.
• Symptoms:Retarded growth; erectness of new growth; yellowing of leaves; production of small fruit.
15
Psyllid Management• Insecticides
Avoid carbamates.Use contact materials earlyUse high volumes to insure coverage
Insect Management for Peppers
16
Bill Chaney Insect Management for Pepper 9/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Garden Symphylan
17
Field damage
18
Bill Chaney Insect Management for Pepper 10/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Symphylans (Garden Centipedes)
Small (1/4 inch) white soft-bodied ‘centipede-like’ animals
EyelessSense the world with antennae 15 body segments12 pairs of legspaired spinnerets
“Nervous” movement, running!!19
Symphylans
Class: Symphyla NOT INSECTS
Long lived (5+ years in the lab)
1 generation per year…2 or 3 possible
Eggs laid in groups in the soil and tended
Newly emerged nymphs have 6 pairs of legs
Molt throughout life; do not feed during molting
20
Bill Chaney Insect Management for Pepper 11/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Symphylans
• Generalist feeders but with a preference for the tissues of higher plants
• May eat 3-15 times their own weight per day
•Antennae sensitive to vapors: chloropicrin, ether, chloroform, and ethyl alcohol…•Tend to avoid light, but will feed above ground
212
Symphylans• Move in soil pores…fast and far
– More than 10 feet per day.
• Diurnal movements…up and
down in the soil profile
22
Bill Chaney Insect Management for Pepper 12/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Symphylan Sampling
23
Symphylan Sampling
24
Bill Chaney Insect Management for Pepper 13/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Symphylan Sampling
25
Symphylan Sampling
26
Bill Chaney Insect Management for Pepper 14/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Symphylans per bait station
0.1 22.6 47.8 64.947.6
27
Symphylan-plant weight regression
0.80.60.40.20.00
25
50
75
100
plant weight 35 days after planting (grams)
Sym
phyl
ans p
er sa
mpl
e
y = 68.157 - 107.82x r2 = 0.720
28
Bill Chaney Insect Management for Pepper 15/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Insect Management for Peppers
SymphylansManagement by insecticides is difficult and still being investigates.
It may be helpful to carefully manage soil moisture and tillage.
29
Insect Management for Peppers
Other Pests
Leafminers
Pepper Weevil
Worms
Flea Beetles30
Bill Chaney Insect Management for Pepper 16/16
Growing Pepper in Sensitive Environments. Gilroy, April 7, 2005
Thanks for your attention.
Questions?Comments?
31