Actara/Platinum: cotton, melons, leafy vegetables Assail: cotton, leafy vegetables. 2) Multiple applications allowed by labels.

Transcription

1 Concerns for Whitefly Management in Multi-crop Communities Draft Guidelines for Cross-Commodity Management of Whiteflies in Arizona Expanded registrations of IGR and neonicotinoids: Applaud/Courier : cucurbits, cotton, lettuce Actara/Platinum: cotton, melons, leafy vegetables Assail: cotton, leafy vegetables 2) Multiple applications allowed by labels. 3) Risk of increased selection pressure on whiteflies 4) The necessity to sustain the efficacies of these valuable chemistries for whitefly control.

2 Arizona Cross Commodity Working Group Arizona Growers Association Arizona Res & Prot Council Western Growers Association Arizona Veg Growers Association Yuma Veg Shippers Association Incorporated Arizona Department of Agriculture University of Arizona PCA s Objective: Harmonize and Sustain Effectiveness of Shared Chemistries While Managing Whiteflies Across Commodities. 1) Regional cropping systems 2) WF population dynamics

3 Yuma Multi-crop Community more than one host-crop is grown in significant acreage within the same community. Yuma Co. Maricopa Co. (e.g. Aguila) Pinal Co. (e.g., MAC) Cropping System ( Acres x 1000) Insecticide Usage ( Treated Acres, x1000) Pyriproxifen Buprofezin Non-Pyrethroids Pyrethroids Chloronicotinyl 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 100 Relative Whitefly Population Abundance Leafy Leafy J F13 F1 Alfalfa F2 F3 Alfalfa F4 F5 F6 F7 F8 F10 F11 Leafy F12 F9 F M A M J Ju A S O N D

4 Central Arizona- Low -intensive Community cotton is the dominant WF host crop grown in a crop community. Maricopa Co. (e.g. Buckeye) Pinal Co. (e.g. Casa Grande) Pima Co. (e.g. Marana) Cropping System (Acres x 1000) Insecticide Usage ( Treated Acres, x1000) Pyriproxifen Buprofezin Non-Pyrethroids Pyrethroids Chloronicotinyl 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Relative Whitefly Population Abundance 50 0 Leafy Veg Leafy J F11 F12 F1 Alfalfa F2 Alfalfa F3 F4 F5 F6 F7 F8 Leafy F M A M J Ju A S O N D F9 F10

5 Principal Treated WF Hosts by Community Yuma

6 Principal Treated WF Hosts by Community Yuma Buckeye

7 Principal Treated WF Hosts by Community La Paz Aguila Westside Buckeye MAC Yuma Pinal Wellton Queen Creek Coolidge Marana

8 General Whitefly Management Guidelines Avoidance Sampling Effective Chemical Use (1 IGR use / crop season)

9 Cross-commodity Guidelines for Applaud/Courier Limit use to 1 application per crop season. 2) Restrict use to no more than 3 applications per year in a multi-crop community. 3) Do not expose multiple, sequential generations of whitefly to Applaud/Courier (or any WF chemistry). 4) Coordinate treatments of adjacent fields such that, when thresholds indicate the need for Applaud applications: they are made within 1 week (within the same whitefly generation), OR the interval between Applaud sprays is more than 4 weeks, or at least 2 whitefly generations.

10 Multi-crop Community Spring Fall Fall F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 Apr May June July Aug Sep Oct Nov

11 Applaud in Yuma Potential Label Max Use Spring Fall Fall F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 Apr May June July Aug Sep Oct Nov

12 Applaud in Yuma Recommended Use Spring Fall Fall F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 Apr May June July Aug Sep Oct Nov If WF control is required, use an alternative insecticide (i.e, KNACK in cotton)

13 Central Arizona - Multi crop (Potential Label Max) Spring Fall F1 F2 F3 F4 F5 F6 F7 F8 F9 Apr May June July Aug Sep Oct Nov

14 Central Arizona - Multi crop (Recommended Use) Spring Fall F1 F2 F3 F4 F5 F6 F7 F8 F9 Apr May June July Aug Sep Oct Nov If WF control is required, use an alternative insecticide (i.e, KNACK in cotton)

15 Cross-commodity Guidelines for Neonicotinoids 1) Multi-crop Communities : Do not apply neonicotinoids. (Centric/Actara, Provado/Leverage, Assail). / : Draft Proposal A single neonicotinoid use (soil or foliar) per crop Do not apply a foliar neonicotinoid spray following the use of a soil application of Admire or Platinum. Soil or foliar neonicotinoids should not be applied during the following periods: Yuma: After April 1 or before Aug 1 Aguila: Before May 1 or After Sept 1 Consider foliar alternatives for vegetables that are planted after WF movement subsides and harvested before aphids typically become abundant. (eg, Oct 7 th ~ Nov 7 th in Yuma Valley)

16 Resistance Risks Associated with Shared Neonicotinoid Uses in a Multi-Crop Community (eg., Yuma current usage) Neonicotinoid Relative Whitefly Population Abundance

17 Resistance Risks Associated with Shared Neonicotinoid Uses in a Multi-Crop Community (eg., Yuma current usage) Neonicotinoid Relative Whitefly Population Abundance

18 Resistance Risks Associated with Shared Neonicotinoid Uses in a Multi-Crop Community Neonicotinoid (eg., Yuma potential usage) Relative Whitefly Population Abundance Not Sustainable

19 Preserve a Neonicotinoid-free Period in Multi-Crop Communities (e.g., Yuma-Recommended) Neonicotinoid IGRs and Conventional Relative Whitefly Population Abundance

20 Cross-commodity Guidelines for Neonicotinoids intensive community No more than 2 neonicotinoid uses per cotton crop (soil, foliar or seed treatment) Sprays should only be used following an initial IGR applications (Stage II of Whitefly IPM Program) Sprays should not to be applied consecutively, but rotated with conventional chemistries (Stage II or III) Draft Proposal

21 Resistance Risks Associated with Neonicotinoid Uses in a -intensive Community (e.g., Buckeye-label max) Neonicotinoid Relative Whitefly Population Abundance Leafy J F11 F12 F1 F2 F3 F M A M J Ju A S O N D F4 F5 F6 F7 F8 F9 F10

22 Resistance Risks Associated with Neonicotinoid Uses in a -intensive Community (e.g., Buckeye-recommended use ) AZ Whitefly IPM Program I II III IGRs Neo Pyr Relative Whitefly Population Abundance Leafy J F11 F12 F1 F2 F3 F M A M J Ju A S O N D F4 F5 F6 F7 F8 F9 F10

23 Resistance Risks Associated with Neonicotinoid Uses in a -Melon System (central Arizona- potential use) Relative Whitefly Population Abundance Leafy J F11 F12 F1 F2 F3 F M A M J Ju A S O N D F4 F5 F6 F7 F8 F9 F10

24 Resistance Risks Associated with Neonicotinoid Uses in a -Melon System (central Arizona-recommended use) I II IGR Pyrethroid IGRs Neo III Pyr Relative Whitefly Population Abundance Leafy J F11 F12 F1 F2 F3 F M A M J Ju A S O N D F4 F5 F6 F7 F8 F9 F10

25 Applaud/ Courier Label 2 uses per crop Proposed CC Guidelines 1 use / crop, narrowed use window Assail, Actara, Adage, Provado, Leverage 2-4 uses per crop No use on in MCC Limit use in Veg / Melon No more than 2 nonconsecutive uses in cotton intensive communities, and only after Stage I - IGR