Pesticide Safety Insecticides Update 2006

Transcription

1 University of Massachusetts Amherst Amherst Cranberry Station Extension meetings Cranberry Station Outreach and Public Service Activities 2006 Pesticide Safety Insecticides Update 2006 Anne L. Averill University of Massachusetts - Amherst, averill@eco.umass.edu Follow this and additional works at: Part of the Horticulture Commons Recommended Citation Averill, Anne L., "Pesticide Safety Insecticides Update 2006" (2006). Cranberry Station Extension meetings. 66. Retrieved from This Article is brought to you for free and open access by the Cranberry Station Outreach and Public Service Activities at ScholarWorks@UMass Amherst. It has been accepted for inclusion in Cranberry Station Extension meetings by an authorized administrator of ScholarWorks@UMass Amherst. For more information, please contact scholarworks@library.umass.edu.

2 Insecticides Update Pesticide Safety Training 2006 Anne Averill:University of MA Cranberry Station

3 New insecticides Lower health risk to humans, non-targets, and environment Broadens adoption of IPM and elimination of conventional insecticides

4 New insecticides Reduced-risk Given special consideration and expedited registration Insect growth regulators Confirm and Intrepid SpinTor/Entrust OP (organophosphate) replacment Actara Admire

5 Insect growth regulators (IGR) Insects must molt to grow Coordinated by hormones IGRs interfere with this process

6 Confirm and Intrepid IGRs specific to caterpillars

7 Confirm and Intrepid Cranberry targets: Blackheaded fireworm False armyworm Sparganothis Spanworms Gypsy moth

8 Confirm and Intrepid Must be eaten Small caterpillars most susceptible! May take several days to die so delay assessment

9 Intrepid NO Zone II use allowed Intrepid is more active than Confirm, so is compound of choice

10 Confirm and Intrepid Coverage! Good systems realize best results Spreader/binder recommended Drying time (6 h) Higher rates recommended

11 Confirm and Intrepidsummer generation BHF, Spag Look for flight ONSET -- first moth flight (several moths/trap/night) You are targeting small larvae as hatch occurs

12 Confirm and Intrepid Fireworm: apply 7-10 d after ONSET of flight Fireworm Sparganothis: apply d after ONSET of flight Sparganothis

13 Confirm and Intrepid For both: apply second spray 10 d after first Multiple sprays may be critical, especially for extended flights

14 Confirm and Intrepid Not recommended for cranberry fruitworm in standard chemigation systems Lowgallonage only

15 Just hatched cranberry fruitworm larvae, dead on fruit dipped in Intrepid (100 gpa dilution)

16 SpinTor Entrust: = organic formulation Targets are caterpillars Spag, spanworms, false armyworm, fireworm

17 SpinTor Not persistent Coverage important Must have good system Efficacy may be low for lower rates

18 OP-alternatives Actaraand Admire In same class of new chemistry Same mode of action (nerve posion) Active against beetles

19 Actara and Admire Systemic--move into plant Forms reservoir High residual activity Leaf Cross - Section

20 Actara Cranberry weevil: effective against both spring and summer populations Flea beetle

21 Zone II restricted but for resistant weevil, is sole choice Submit paperwork if used Actara

22 Actara Specified restrictions No aerial applications No flow-through bogs Use pattern 2-3 applications possible 8 oz limit/season

23 Actara Rates 2-4 oz/a; lower rates effective Control ACT 2 oz ACT 3 oz Mean weevils/sweep set Pre-trt 2 DAT 5 DAT 8 DAT

24 Actara Not broad spectrum Will NOT help on blackheaded fireworm, sparganothis, etc.

25 Admire for soil insects

26 Admire SOIL INSECTS Hits beetle group Striped colaspis Oriental beetle Hoplia?? Flea beetle??

27 Target grub stage in soil Admire

28 Admire Sample adult flight to time spray Target tiny larvae as they hatch Soil drench Chemigation/ground only Irrigate before & after ( ) Do not use on saturated soil

29 Avaunt Do not use Weevil emergency is over; thus there is no Emergency Exemption for 2006 Moving through regular channels for full label

30 Winter moth: pest alert New problem: here to stay

31 Flight: mid to late November >>

32 Is it winter moth or blackheaded fireworm?

33 Larvae weasel into buds and feed --Hard to detect --Move from bud to bud

34 Free-feed on foliage once buds open Would be picked up in net on cranberry >>>Sample in May!

35

36 Admire for striped colaspis Use sweep net in June/July to determine adult activity Target just-hatching larvae with soil drench

37 Apply in July for OB Larvae just hatching from eggs are target Monitor adults with traps Get Admire on early so can be taken up by plant Expensive; good timing will maximize investment Very long residual activity

38 Avaunt Actara Admire Intrepid SpinTor 2005 not yet Confirm Entrust registered Shorter rinse needed Apply as drench; irrigate before and after Shorter rinse needed; multiple apps Shorter rinse needed High residual High residual High residual Low residual No Zone II Intrepid: no Zone II Effective only on spring cranberry weevil not summer Effective on both spring and summer weevil populations Target eggs as hatch; monitor colaspis adults with sweeps and oriental beetle with traps Must target small caterpillars; in summer use pheromone traps to target first flight and egglaying spring weevil only, also hits most leps Spring and summer weevil, flea beetle Soil grubs: colaspis, oriental beetle Spag, bhf, cutworms, spanworms, gypsy Spag, bhf, cutworms, spanworms, gypsy

39 Avaunt Actara Admire Intrepid SpinTor 2006 not available Confirm Entrust OP alternative OP alternative reduced reduced risk risk neurotoxic neurotoxic hormone agonist neurotoxic systemic/ ingestion systemic/ ingestion ingestion Trans-laminar Spring and summer weevil, flea beetle Soil grubs: colaspis, oriental beetle Spag, bhf, cutworms, spanworms, gypsy Spag, bhf, cutworms, spanworms, gypsy

40 Oriental beetle life cycle JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC cm pupa 1 st instar 2 nd instar 3 rd instar 3 rd instar

41 Primary activity has changed Old: contact nerve poisons New: still mostly nerve poisons but are: Translaminar: locally systemic; e.g. penetrates leaf tissue and forms reservoir (SpinTor) Systemic: taken up and transported to growing plant portions (Admire, Actara) Ingestion: must be eaten to be effective (Avaunt, Intrepid)

42 Avaunt Actara Admire Intrepid SpinTor 2005 not yet Confirm Entrust registered reduced risk OP alternative OP alternative reduced risk reduced risk neurotoxic neurotoxic neurotoxic hormone agonist neurotoxic ingestion systemic/ ingestion systemic/ ingestion ingestion Translaminar spring weevil only, also hits most leps Spring and summer weevil, flea beetle Soil grubs: colaspis, oriental beetle Spag, bhf, cutworms, spanworms, gypsy Spag, bhf, cutworms, spanworms, gypsy