Update on Blueberry Insect Pest Management. Pest Management

Transcription

1 Update on Blueberry Insect Pest Management Oscar E. Liburd, Ph.D. Assistant Professor Pest Management

2 Flower thrips, Frankliniella sp. 10 Over the canopy 10 In the canopy 10 Emergence

3 Population of Flower Thrips in (2005) 160 # thrips captured per trap Sebring Wildwood 0 2/4/2005 2/11/2005 Haines City Date 2/18/2005 2/25/2005 Wildwood

4 Microscopic Examination of Petals E Eggs Tf Flower Thrips 1400 Average # Flower Thrips per Trap Malathion Diazinon Actara SpinTor Ecozin Surround Untreated Control Insecticides Prior to bloom, we are recommending malathion, SpinTor sprays After 10% bloom until petal fall weekly applications of SpinTor 6 oz per acre After bloom malathion, SpinTor and Provado 1.6 F.

5 Style Petals Fruits Ovaries Petals Ovary Style Fruit Flower tissues Average no. of thrips emerging / 10 flowers Soil Flower clusters Canopy Over canopy Location of Thrips Average number of thrips emerging

6 Evaluation of selected insecticides for managing flowering thrips in SHB 50 Mean # of Thrips / Rep UTC SpinTor 2 SC 4 oz SpinTor 2 SC 6 oz Provado 1.6 F 4 oz / acre Imidan 70 W 11/3 lbs / acre

7 RECOMMENDED APPLICATIONS FOR PROVADO 1.6F Crop Pest Rate Remarks Blueberry (high and low bush) Aphids Leafhoppers Thrips Japanese beetle oz/a oz/a Do not make foliar applications prior or during bloom. 1. Do not exceed a total of 40 fl-oz. of Provado 1.6F (0.5 lbs. a.i.) / acre during each growing season. 2. Do not exceed a total of 0.5 lbs. a.i. of Provado 1.6F + Admire / acre during each growing season 3. Do not exceed 5 applications of Provado 1.6F

8 Continue to screen insecticides for controlling thrips (Malathion, Assail, Novaluron, SpinTor, Actara Assail) Continuing our studies investigating the biology movement of thrips into blueberry fields Efficacy trials for reduced-risk insecticides for control of flower thrips (Field FL 2004) % of thrips surviving after insecticides application 140% 120% 100% 80% 60% 40% 20% 0% Assail Malathion Novaluron Esteem Calypso GF 968 Control SpinTor

9 Current Studies Thrips (2005) Evaluating the potential for biological control of thrips Investigating two beneficial insects: - Thripex-plus (commercial name), predatory mite: Amblyseius cucumeris - Minute pirate bug: Orius insidiosus

10 Female (left) and male of cranberry tipworm, Dasineura oxycoccana (Johnson). Mean number of eggs Flower Leaf Larvae and damage of cranberry tipworm in a blueberry floral buds 0 Rabbiteye Blueberry species Southern highbush

11 Beginning stage of necrotic damage resulting from gall midge injury of floral buds Diazinon Malathion Actara SpinTor Ecozin Surround Control Prior to bloom, we are recommending diazinon/ SpinTor application During bloom, only SpinTor application

12 Current Studies blueberry gall midge (2005) Eulophid and Platygastrid wasps Adult Aprostocetus female Synopeas (Synopeas) female We are trying to improve the timing of sprays by correlating different spray schedules with gall midge injury We are studying the susceptibility of different varieties to gall midge injury We are continuing to screen insecticides for potential control of gall midge

13 Other common Insects Blueberrry bud mite control Horticultural oil (JMS Stylet oil) Leaf-footed bug control Malathion/Diazinon

14 Other common Insects Adult of cranberry fruitworm control Confirm 2F (tebufenizide) Larva of the cranberry blueberry injury fruitworm

15 RECOMMENDED APPLICATIONS FOR ADMIRE 2F Crop Pest Rate Remarks Japanese beetle (adults, feeding on foliage) Blueberry (high and low bush) White grub complex(grubs of Asiatic garden beetle, European and Masked chafer, Japanese beetle and Oriental beetle) fl.oz/a Do not make foliar applications prior or during bloom. 1. Do not exceed a total of 32 fl-oz. of Admire 2F (0.5 lbs. a.i.) / acre during each growing season. 2. Do not exceed a total of 0.5 lbs. a.i. of Admire 2F + Provado 1.6F/ acre during each growing season 3. Do not apply closer than 7 days before harvest (7 day PHI).

16 RECOMMENDED APPLICATIONS FOR ACTARA Crop Pest Rate Remarks Blueberry (high and low bush) Aphids Leafhoppers oz/a Apply before pests reach damaging levels. Scout fields and treat again if populations rebuild to potentially damaging levels. Apply higher rates for heavy infestations. 1. Do not exceed a total of 8.0 oz. of Actara (0.125 lbs. a.i.) / acre during each growing season. 2. Allow at least 7 days between applications. 3. Do not apply closer than 3 days before harvest (3 day PHI). 4. Use sufficient water volume to ensure thorough coverage of foliage. 5. Do not use less than 10 GPA for ground applications or 5 GPA for aerial applications.

17 Acknowledgements I would like to thank H. Alejandro Arevalo (University of Florida) for collection and analysis of data. I am also grateful to Scott Weihman (University of Florida) for some of the photos presented. I would like to thank Jay Cee L. Turner (University of Florida) for formatting the power point presentation. I am grateful to the Florida Blueberry Growers Association for funding the project and to the USDA for RMAP Grant #

18 THANK YOU Oscar E. Liburd Department of Entomology and Nematology University of Florida Gainesville, FL 32611