Symptoms- Small, white flies
feed on young plants, causing stunting.
Management Options
Guideline
Scouting/thresholds
None established.
Resistant cultivars
None
known.
Cultural management
None established.
Conventional products
A.malathion-Malathion 57EC (1.5 –
3.0 pt/A). OR
B.*endosulfan- Several products (rates vary
depending on formulation). Apply as needed to plants in propagating beds, and
in the field during the year of setting new plants but not after bloom of the
following year. OR
C.*imidacloprid- *Provado
1.6F (3.8 fl. oz/A) or *Pasada 1.6F
(3.75 fl. oz/A) for bearing and bedding plants. OR
D.acetamiprid- Assail SG
(4.0 - 6.9 oz/A).
Organic Products
None known
5.2.1.2
Twospotted Spider Mite
Symptoms- In early spring,
mites begin feeding on the undersides of new leaves, sometimes resulting in
small yellow spots on the upper leaf surfaces. These symptoms do not occur in
all cases, however, and are not seen later in the year. Brownish dry areas on
the lower leaf surfaces are more characteristic of damage. Later, the entire
lower leaf may become dry and brown, giving it a bronzed appearance. Heavily
infested plants look dry and stunted, and their sparse new growth is
yellowish and distorted. Damage is first seen and is most prevalent in dry
areas of a field. Mild growing areas in New York (Hudson Valley and Long
Island) experience problems with mites most frequently.
Management Options
Guideline
Scouting/thresholds
Five
mites/leaf or 15 out of 60 mature (fully expanded) leaflets infested with 1
or more mites. Regular leaf monitoring is necessary for assessing population
growth.
Resistant cultivars
None
known
Cultural management
A.Ensure plots are not overfertilized.
B.Provide adequate irrigation. Cool, moist conditions are unfavorable to
mites.
C.Do not use other insecticides that kill predatory mites.
Conventional products
Chemical control of spider mites is
often not completely effective because of their high mobility, reproductive
rate, and resistance to some pesticides. Good coverage of the plants,
particularly the undersides of the leaves, is critical for adequate protection.
Use adequate water (200 - 300 gal/A) for maximum effectiveness of the miticide. Repeat at 7- to 10-day intervals as necessary
unless otherwise noted on label.
A.*hexakis- *Vendex
4L (1.5 – 2.0 lb/A) Do not exceed 4 lb/A per season. OR
B.*abamectin- *Agri-Mek
0.15 EC (16 fl oz/A), applied twice, 7 - 10 days apart) or *ABBA
0.15EC (16 fl oz/A) applied twice, 7 - 10 days apart. OR
C.hexythiazox- Savey 50DF
(6 oz/A). Savey 50DF has recently been registered in New York for
control of spider mites on caneberries and
strawberries. This product needs to go on early in the infestation (2 - 3
mites per leaf) to be effective since it is primarily toxic to eggs and
immature stages of the mites. Because of this, it is most suitable for
plantings with a chronic spider mite problem. You are only allowed one
application per season. Do not use in strawberry nurseries. Savey is not very hard on beneficial predatory mites. OR
D.*bifenthrin- *Brigade WSB (16 - 32
oz/A). OR
E.*fenpropathin- *Danitol
2.4 EC (16 - 21 oz/A). OR
G.etoxazole- Zeal WP (2 - 3 oz/A) or Zeal Miticide 1 (2 - 3 oz/A). Zeal is primarily an ovacide/larvicide and should be
used early in the life cycle of mites. OR
H.acequinocyl- Kanemite 15SC (21 - 31
oz/A). Apply in at least 100 gallons of water.
NOTE:
Do not apply *Brigade or *Danitol within 100
feet (using ground equipment) or 300 feet (aerial) of coastal marshes or streams
that drain into coastal marshes.
*Danitol
has a maximum single application rate of 0.3 lb AI per acre and a maximum
seasonal application of 0.6 lb AI per acre.
Organic products
(May also be used in conventional production.)
A.paraffinic oil- Organic JMS Stylet
Oil (3 - 6 qt/100 gal). Apply for optimum coverage of leaf surfaces. Use at
least 200 PSI pressure to ensure proper coverage
