Influence of Drip Irrigation on Imidicloprid
Efficacy & Whitefly Control
Yuma, AZ - June 4, 2001
60
55DAT
DAT
Nymphs / cm 2
40
30
Sub-surface Drip
Surface Drip
20
10
0
Admire
Actara
16 oz
Platinum
Confidor
11 oz
Check
Untreated
Green Peach Aphid Control with Admire
in Lettuce via Drip Chemigation
Wet Date – Nov 17
Mean aphids per plant
200
150
100
25
20
15
10
5
0
Yuma Ag Center, Spring 1996
200
Admire 5 oz
Admire 10 oz
Admire 15 oz
Admire 20 oz
Untreated
12/30
1/14
150
100
1/28
2/12
2/26
3/11
25
20
15
10
5
0
Lettuce Aphid
Efficacy In
Drip Irrigated
Romaine
Lettuce Aphid Efficacy on Drip
Romaine Lettuce – Spring 2002
Romaine
20
15
25
Admire 16 oz
Platinum 8 oz
Dinotefuron 0.4 lb ai
Orthene 97 - 1 lb
Check
20
15
Harvest
Mean aphids / plant
25
10
Injection
10
5
5
0
0
6
Mar
12
Mar
25
Mar
4
Apr
11
Apr
18
Apr
Lettuce Aphid Efficacy on Drip
Romaine Lettuce – Spring 2001
Mean Lettuce Aphids /Plant
300
250
Admire 12 oz (1) ; 6 oz (2)
Platinum 7 oz (1) ; 4 oz (2)
Pirimor 6 oz
Untreated
200
150
100
Drip # 1
Drip # 2
Drip # 1
Drip # 1
50
0
Feb
20
March
8
March
22
April
2
April
16
Uniform Chemigation is Critical for Effective
Insect Management
-You need to have the injection period be
long enough to move the chemical through
the entire drip system
AND
-You need to have a post-injection period of
clean irrigation water.
Insect Management in Drip Irrigation
Uniform Chemigation:
The injection period should be at
least as long as it takes water /
chemical to move from the head
to tail-end of the drip system.
Twice as long is better.
The post-injection, clean water
irrigation period should be at
least as long as it takes water /
chemical to move from the head
to tail-end of the drip system.
Twice as long is definitely better.
Insect Management in Drip Irrigation
• The easiest way to determine travel
times of chemicals (and water)
through a drip system:
» Inject chlorine (at about 10 - 20 ppm)
into the system and follow its
movement through the drip system.
» It is easy to spot when chlorine
reaches any point by testing the
water with a pool/spa test kit.
Timing of Admire / Platinum Application
Fall Melon
Trial
Brown Ranch
Somerton, AZ
Fall 2002
Nymphs / cm
10
Admire
Platinum
Check
8
6
* Admire 16 oz
4
* Platinum 8 oz
2
0
7 DAT
21 DAT
35 DAT
50 DAT
65 DAT
Neonicotinoids For Flea Beetle Control
Pale-stripped Flea Beetle
Desert Flea Beetle
Flea Beetle Control on Melons
Fall 2001- Furrow Irrigated
14 DAT
a
% Damaged Plants
80
Coty.
Cotyledons
Leaves
60
40
Leaves
b
20
0
b
c
Admire
16 oz
c
Platinum
8 oz
Platinum
5 oz
dinotefuron
Untreated
Flea Beetle Control on Melons
Fall 2002 – Drip Irrigated
% Damaged Plants
60
50
14 DAT
Leaves
Cotyledons
40
a
30
b
20
10
c
c
0
Admire
Platinum
Dinotefuron
Untreated