Areawide Diamondback Moth Trapping Network

Transcription

1 Areawide Diamondback Moth Trapping Network In response to the recent outbreaks of Diamondback moth (DBM), Plutella xylostella in Yuma, we have established a pheromone trap network designed to monitor the activity and movement of adult populations of DBM. PCAs have had difficulty controlling DBM in cabbage, broccoli and cauliflower since October. Traps have been placed in Roll, Wellton, Dome Valley, Gila Valley and Yuma Valley in locations where cole crops are presently being grown or in areas where infestations were known to occur this fall. The data is not intended to indicate field infestations, as trap data is largely a reflection of adult movement. The data may reflect emergence of adults in adjacent fields with known infestations, or provide an indication that DBM may be moving into fields not previously infested. If nothing else, the data may make PCAs aware of increased pest activity in some areas and encourage intensified scouting in susceptible produce fields. Of great importance is the fact that DBM populations are beginning to spread into direct-seeded crops that were not previously effected by DBM. For this reason, we would like to track moth activity, particularly relative to what would normally be expected in Yuma. Historically, from 998-, we established trap network in Yuma which included DBM. Data from those studies is provided below for a historical perspective. What concerns us the most, is that during that -year trapping period DBM counts never exceed moths/trap/day. However, in just the few weeks we ve been trapping DBM since Dec, we ve had four trap locations where DBM counts have exceeded moths/trap/day and in one location we caught over moths /day. These traps were all located in the Yuma Valley, stretching from Co. st up to Co. 9 th street. We will continue to monitor DBM trap activity throughout the season. We will also continue to trap population activity throughout the summer to determine whether DBM is active when brassica hosts are not available. This may give us an indication of the potential for more problems on next years fall crops. From a historical perspective we ran traps during the summer of 999- in the Yuma Valley and consistently found DBM moths in traps at low levels (-. moths/trap/night from July-ust). We concluded at that time that many of the DBM captured may have come in with transplants, but were not certain whether DBM is capable of over summering in the desert. We hope to gain more insight into the pest s activity during summer moths in Yuma this year. VegIPM Update, Vol. 8, No. 9,, 7

2 Area-wide DBM Trapping Network Yuma, Arizona Wing Trap with DBM pheromone lure DBM moths captured in trap VegIPM Update, Vol. 8, No. 9,, 7

3 Trapping Data by Location and Crop Diamondback Moths / Trap / Week Area Location Crop Texas Hill E and Co.. Cabbage TP Texas Hill E and Co. Cabbage TP - Set Tacna E and Co.. Cauliflower TP - Set Tacna E and Co. Cauliflower TP - Set Tacna E and Co. Flower/Broccoli - - Set Roll 9E and Co. Broccoli 7 Roll E and Co. Broccoli - - Set 8 Roll 7E and Co..-E Cauliflower TP 9 Roll 7E and Co..-W Cauliflower TP - Set 7 Roll E and Co. Fallow Wellton E and Co. 9 Cabbage TP 9 Wellton 7E and Co. Cotton Dome Valley E and Co. 8 Cauliflower TP 9 8 Dome Valley E and Co. 8 Cotton, Sudan Dome Valley 9E and Co. 7 Cauliflower TP - - Set Dome Valley 7E and Co. Fallow 7 Dome Valley 7E and Co. Broccoli Set 8 Dome Valley 8E and Co.. Broccoli Set 9 Dome Valley E and Co. Cauliflower TP - Set Gila Valley.E and Hwy 9 Cotton Gila Valley 7E and Co. 8 Cauliflower TP Gila Valley 7E and Co. Cotton Gila Valley E and Hwy 9 Fallow 7 Gila Valley Pacific and Co. Cabbage TP Gila Valley E and Co. Broccoli Set Yuma.E and th St-W Cauliflower TP 7 Yuma.E and th St-E Cauliflower TP 8 Yuma Valley Co and Ave C. Kale - - Set 9 Yuma Valley Co. and Ave D Fallow Yuma Valley Co 8 and Ave D Cauliflower TP Set 7 Yuma Valley Co. 7 and Ave F Cauliflower TP - Set Yuma Valley Co.. and Ave G Caulfilower TP Yuma Valley Co. and th Ave Broccoli - set Yuma Valley Co. and Hwy 9 Fallow Yuma Valley Co. and Ave H Cauliflower Set Yuma Valley Co. 9 and Ave I Broccoli - - Set 7 Yuma Valley Co. 7th and Ave J Cauliflower TP 8 Yuma Valley Co. th and River Fallow 9 Yuma Valley Co. and Ave G Cauliflower TP - - Set Yuma Valley Co. th and Ave H Fallow Yuma Valley Co. th and Ave G Fallow Yuma Valley Co. and Ave F Brassicas 7 Yuma Valley Co. and Ave F/ Cauliflower TP Yuma Valley Co and Fortuna Cabbage TP - Set Yuma Valley Co. 8. and Ave F Cauliflower TP 8 Yuma Valley Co. 8 and Ave E Fallow 7 Yuma Valley YAC_Blk J Cauliflower TP 7 8 Bard Ross Rd and Perez Cauliflower TP Set 9 Bard Flood and Hoppe Broccoli Set 9 VegIPM Update, Vol. 8, No. 9,, 7

4 8 7 Texas Hill-Tacna- Roll E and Co. E and Co. E and Co. E and Co. E and Co. 9E and Co. E and Co. 7E and Co. 7 - W 7E and Co. 7 - E E and Co Wellton/Dome Valley E and Co. 9 7E and Co. E and Co. 8 E and Co. 8 9E and Co. 7 7E and Co. 7E and Co. 7E and Co. 8E and Co. E and Co. 9 Gila Valley E and Hwy 9 7E and Co. 8 7E and Co. E and Hwy 9 Pacific and Co. E and Hwy 9.E and st - W.E and st -E 9

5 South Yuma Valley Co. and Ave D Co. and Ave D Co. and Levee Co.. and Ave G Co. 7 and Ave F Co. 7 and Ave J Co. 8 and Ave D Co. 9 and Ave I Co. and Hwy 9 Co. and th Ave 9 North Yuma Valley Riverside and Hope Co. 8 and Ave E Co. 8. and Ave F Co. and Fortuna Co. and Ave F / Co. and Ave F Co. and Ave G Co. and Ave H Co. and Ave G 9 Bard/Winterhaven Ross Rd and Perez Flood and Hoppe 9

6 Historic DBM Trap Data Yuma Valley Yuma Valley 998 Yuma Valley 999 Yuma Valley Yuma Valley Gila Valley Gila Valley 998 Gila Valley 999 Gila Valley * Data show the highest moth catch among the trap locations in each Valley for each year. 9