1 - Phytosanitary Resources

Survey Procedures
Guidelines for Tomato Pinworm Adapted for Tuta absoluta
Monitoring recommendations for the tomato pinworm, Keiferia lycopersicella,
in California (using Pherocon 1-C trap, a type of Delta trap) suggest that traps
be installed at the time of planting at the density of one per 10 acres (4.04 ha),
but with no fewer than 2 traps per field. They also suggest that a trap with no
lure be used to serve as a control for lure effectiveness in the field (Zalom et
al., 2008).
Another way to control for lure effectiveness is to save pheromone lures from
previous batches and use these together with newer batch lures (Robertson,
2011). Service the traps twice per week from planting to harvest. When traps
begin to capture males, begin monitoring the foliage for larval damage (Zalom
et al., 2008). A similar monitoring approach using Delta or Pherocon 1-C traps
could be employed for Tuta absoluta.
Refer to Table 4-3 on page 4-17 for a summary of the French guidelines on the
estimated level of risk from infestations of Tuta absoluta based on male moth
captures (FREDON-Corse, 2009a). For further information on insecticides,
refer to Control Procedures on page 6-1.
Table 4-3 Level of Risk Based on Numbers of Adult Male Tuta absoluta 1 Trapped
If this number of adult
males trapped (risk):
1 Adapted from FREDON-Corse, 2009a.
Then begin mass trapping
using:
And apply:
< 10 in 1 month (low)
< 3 in 1 week (low)
25 to 40 traps/ha
3 to 30 in 1 week (moderate) 25 to 40 traps/ha Treatment every 10 days
> 30 in 1 week (high) 25 to 40 traps/ha Treatment every 10 days
Light Traps
Males and gravid females exhibit a strong phototactic response (Vargas, 1970).
As such, light traps can be used to capture adult males and females of Tuta
absoluta (Bolkmans, 2009; Laore Sardegna, 2010; Rodrigues de Oliveira et al.,
2008). In greenhouses, place light traps near entry doors and use only during
sunset and sundown (Bolkmans, 2009). Light traps should not be used in
vented greenhouses that do not have proper screening in the openings
(Koppert, 2009).
A modified light trap was developed for Tuta absoluta capable of capturing
thousands of males and a substantial number of females per night (Russell
IPM, 2009c). The light trap, Ferolite-TUA, uses a combination of pheromone
6/2011 Tomato Leafminer 4-17
Emergency and Domestic Programs