Relative Efficacy Guide for Pears
This table is intended as a guideline to the relative efficacy of pesticides against a certain pest (see also Relative Efficacy Guide for Apple). Use it in conjuction with the pest Control Program for Pears, which gives recommended rates and timing of sprays. The information in the table is based on research conducted at the WSU Wenatchee Tree Fruit Research and Extension Center. Tolerance or susceptibility may vary from one area to the next.
| Pests | ||||||||||||||||||
| Trade Name (Rate/acre) Common Name | PP | CM | GMB | SJS | GAA | ERM | PRM | SM | PBM | LEP | SB | LB | LR | |||||
| Prebloom | ||||||||||||||||||
| Actara 25WDG (4.5-5.5 oz) thiamethoxam |
4 | -- | 3-4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Asana XL (1 pt) esfenvalerate |
1-4c | -- | -- | -- | -- | -- | -- | -- | -- | -- | 4 | 4 | -- | |||||
| Assail 70WP (3.4 oz) acetamiprid |
4 | -- | 3-4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Aza-Direct 1.2%L (32 fl oz) azadirachtin |
2-3 | -- | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Calypso 4F () thiacloprid |
4 | -- | 3-4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Centaur 70W (34.5 oz) buprofezin |
2-3 | -- | 4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Esteem 35WP (4 - 5 oz) pyriproxyfen |
3 | -- | -- | 3-4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Lorsban Advanced (4 pt) chlorpyrifos |
-- | 3-4 | -- | -- | -- | 4 | 3-4 | |||||||||||
| Nexter 75WSB (6.6 - 10.67 oz) pyridaben |
3-4 | -- | 1-2 | -- | -- | 4 | 3-4 | 2-4 | -- | -- | -- | -- | -- | |||||
| petroleum oil- dormant (1.5 % v/v) |
2-3 | -- | -- | 3 | -- | 3-4b | 2 | -- | 2 | -- | -- | -- | 3-4 | |||||
| petroleum oil- dormant (1.5 % v/v + Lorsban Advanced (4 pt) chlorpyrifos |
2-3 | -- | 3 | 4 | 3 | 3-4 | -- | -- | -- | 2 | 2-3 | 2-3 | -- | |||||
| petroleum oil- dormant (1.5 % v/v + Diazinon 50W (4 lb) diazinon |
2-3 | -- | 3 | 4 | 3 | 3 | -- | -- | -- | 2 | 2-3 | 2-3 | -- | |||||
| Rimon 0.83EC (32 fl oz) novaluron |
3-4 | -- | -- | -- | -- | -- | 1-2 | -- | -- | -- | -- | -- | -- | |||||
| Surround WP (25 - 50 lb) kaolin clay |
3-4 | 2-3 | -- | -- | -- | 1-2 | 1-2 | 1-2 | -- | -- | -- | -- | -- | |||||
| Vydate 2L (3 - 4 qt) oxamyl |
-- | -- | -- | -- | 2 | -- | 2-3 | -- | -- | -- | -- | -- | ||||||
| Trade Name (Rate/acre) Common Name | PP | CM | GMB | SJS | GAA | ERM | PRM | SM | PBM | LEP | SB | LB | LR | |||||
| Postbloom | ||||||||||||||||||
| Acramite 50WS (0.75 - 1 lb) bifenazate |
-- | -- | -- | -- | -- | 4 | 1-2 | 4 | -- | -- | -- | -- | -- | |||||
| Actara 25WDG (5.5 oz) thiamethoxam |
4 | -- | 3-4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Agri-Mek 0.15EC (10 - 20 fl oz) abamectin |
3-4 | -- | -- | -- | -- | 4 | 4 | 3-4 | -- | -- | -- | -- | -- | |||||
| Altacor 35WDG (3 - 4.5 oz) chlorantraniliprole |
-- | 4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 4 | |||||
| Apollo 4SC (4 - 8 fl oz) clofentezine |
-- | -- | -- | -- | -- | 2-4 | 1 | 2-4 | -- | -- | -- | -- | -- | |||||
| Assail 70WP (3.4 oz) acetamiprid |
4 | 3-4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 2 | ||||||
| Aza-Direct 1.2%L (32 fl oz) azadirachtin |
2-3 | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Calypso 4F () thiacloprid |
4 | 3-4 | 3-4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 2 | |||||
| Centaur 70W (34.5 oz) buprofezin |
2-3 | -- | 4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Clutch 50WDG (4 - 6 oz) clothianidin |
4 | 2 | 3-4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Danitol 2.4EC (20 fl oz) fenpropathrin |
-- | 3-4 | -- | -- | -- | -- | -- | -- | -- | -- | 4 | -- | 4 | |||||
| Delegate 25WG (4.5 - 7 oz) spinetoram |
-- | 4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 4 | |||||
| Diazinon 50W (4 lb) diazinon |
-- | 2 | 3-4 | 3 | 2-3 | -- | -- | -- | -- | -- | 3 | 3 | -- | |||||
| Dimethoate 2.67EC (3 pt) dimethoate |
-- | 2 | -- | -- | 2-3 | -- | -- | -- | -- | -- | 3-4 | 3-4 | -- | |||||
| Envidor 2SC (16 - 18 fl oz) spirodiclofen |
-- | -- | -- | -- | -- | 4 | 4 | 4 | -- | -- | -- | -- | -- | |||||
| Esteem 35WP (5 oz) pyriproxyfen |
2-3 | 3 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 3-4 | |||||
| Exirel (10 - 17 fl oz) cyantraniliprole |
-- | 4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 4 | |||||
| FujiMite 5%EC (1 - 2 pt) fenpyroximate |
3-4 | -- | -- | -- | -- | 4 | 3 | 4 | -- | -- | -- | -- | -- | |||||
| Imidan 70W (3 - 5.33 lb) phosmet |
1-3 | 3-4 | 3 | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | 2 | |||||
| Intrepid 2F (16 fl oz) methoxyfenozide |
-- | 2-3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 3-4 | |||||
| Nexter 75WSB (6.6 - 10.67 oz) pyridaben |
3-4 | -- | -- | -- | -- | 4 | 3 | 2-3 | -- | -- | -- | -- | -- | |||||
| Proclaim 5SG (3.2 - 4.8 oz) emamectin benzoate |
-- | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 4 | |||||
| Provado 1.6F () imidacloprid |
3-4 | -- | 3-4 | -- | 1 | -- | -- | -- | -- | -- | -- | -- | -- | |||||
| Savey 50DF (4 - 6 oz) hexythiazox |
-- | -- | -- | -- | -- | 2-4a | 1 | 2-4 | -- | -- | -- | -- | -- | |||||
| Sevin 4F (0.5 - 3 qt) carbaryl |
-- | 2 | -- | 1 | 1 | -- | 3 | -- | -- | -- | 1 | 1 | -- | |||||
| Success 2F (6 - 4 fl oz) spinosad |
1 | 2-3 | -- | -- | -- | -- | -- | -- | -- | 4 | -- | -- | 4 | |||||
| Surround WP (50 lb) kaolin clay |
3-4 | 2-3 | -- | -- | -- | 1-2 | 1-2 | 1-2 | -- | -- | -- | -- | -- | |||||
| Ultor 1.25L (10 - 14 fl oz) spirotetramat |
3-4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | ||||||
| Vendex 50WP (1 - 2 lb) fenbutatin oxide |
-- | -- | -- | -- | -- | 1-4 | 2-4 | 2-4 | -- | -- | -- | -- | -- | |||||
| Zeal 72WDG (3 oz) etoxazole | -- | -- | -- | -- | -- | 4 | -- | 4 | -- | -- | -- | -- | -- | |||||
| Trade Name (Rate/acre) Common Name | PP | CM | GMB | SJS | GAA | ERM | PRM | SM | PBM | LEP | SB | LB | LR | |||||
aRecommended for prebloom use
bRate per 100 gallons (cutworm spray), use as a trunk spray
cResistance is present in many areas
Rating System: 4 = excellent control; 3 = acceptable in low pressure situations; 2 = suppression activity only; 1 = poor control; - = not tested.
Pests: PP = Pear psylla; CM = Codling moth; GMB = Grape mealybug; SJS = San Jose scale; GAA = Green apple aphid; ERM = European red mite; PRM = Pear rust mite; SM = Spider mite; PBM = Pearleaf blister mite; LEP = Cutworm, Armyworm and Fall webworm; SB = Stink bug; LB = Lygus bug; LR = Leafrollers.