PEPPER

Author

John J. McHugh, Jr. and Ronald F. L. Mau

Department of Entomology

Honolulu, Hawaii

 

Table 1. Disease Control Recommendations.

Disease

Control Measure(s)

Comments

Alternaria Maneb 75DF or 80WP at 1.5 to 2 lb. per acre or Manex FL at 2.4 to 3.2 pt. per acre. Treat at first sign of disease.

7 day PHI.

Bacterial leaf spot Resistant varieties or hybrids.

Copper sprays at labelled rates plus Maneb 75DF, 80WP at 1.5 to 2 lb. per acre or Manex FL at 2.4 to 3.2 pt. per acre to reduce spread of disease where resistant varieties are not used.

Check with seed dealers and distributors for availability of resistant varieties or hybrids. Use disease free seed.

0 day PHI for copper, 7 day PHI for Maneb and Manex.

Phytophthora blight Resistant varieties or hybrids.

Metalaxyl (Ridomil Gold) at 1 to 2 pt. per acre as a preplant broadcast or banded spray in 50 gal. water before or at time of transplanting OR Maneb 80 at 2 to 3 lb. per acre or Manex at 2 to 3 pt. per acre at 7 to 10 day intervals.

Check with seed dealers and distributors for availability of resistant varieties or hybrids.

Grow peppers on raised beds with good drainage.

Rotate to non-susceptible hosts for 3 to 4 years.

Metalaxyl must be incorporated into root zone for maximum effectiveness.

7 day PHI for Maneb and Manex, 7 day PHI for metalaxyl.

Powdery mildew (Leveillua taurica) Sulfur (Thiolux DF) at 3 to 5 lb. per acre.

See Hawaii Pesticide Information Retrieval System for Information on peppers

Under heavy pressure may have to spray twice a week.

0 day PHI.

Tomato spotted wilt virus Vectored by Western Flower Thrips - no effective chemical control measures. Tomato spotted wilt virus can become very serious where susceptible crops are grown without interruption. Fallow or crop rotation to nonsusceptible hosts is the best control measure. Sequential planting in side-by-side plots is discouraged.

Table 2. Insect and Mite Control Recommendations.

Insects/Mites

Control Measure(s)

Comments

Aphids (various species) Conserve natural enemies.

Imidacloprid (Provado 1.6F) at 3.75 fl.oz. per acre OR methomyl (Lannate) at 1.5 to 3 pt. per acre for liquid (LV) or 0.5 to1 lb. per acre for dry formulation (90 WSP) OR dimethoate (Dimethoate 4EC) at 0.6 pt. per acre or Dimethoate 2.67EC at 1 pt. per acre.

See Hawaii Pesticide Information Retrieval System for Information on peppers

By limiting chemical insecticide use predators and parasites can help control aphid populations. Syrphid maggot predators of aphids are very effective in controlling certain aphid species.

For Provado, do not exceed 18.75 fl. oz. per acre per crop cycle, 0 day PHI; 1 day PHI for methomyl; 0 day PHI for dimethoate.

Beet Armyworm and Corn Earworm Esfenvalerate (Asana XL) at 9.6 fl. oz. per acre.

See Hawaii Pesticide Information Retrieval System for Information on peppers

1 day PHI.
Broad mite Endosulfan (Thiodan 3 EC) at 0.67 to 1.33 qt. per acre or Thiodan 50W at 1 to 2 lb. per acre. Limited to 2 applications per year.

Abamectin (Agrimek 0.15EC) at 8 to 16 fl. oz. per acre.

See Hawaii Pesticide Information Retrieval System for Information on peppers

1 day PHI for low rate of endosulfan, 4 day PHI for high rate.

7 day PHI for abamectin.

Melon thrips (Thrips palmi) Spinosad (Success) at 4 to 8 fl. oz. per acre OR abamectin (Agrimek 0.15EC) at 8 to 16 fl. oz. per acre.

See Hawaii Pesticide Information Retrieval System for Information on peppers

Best control achieved at first sign of melon thrips infestation (immature thrips are much easier to control).

Melon thrips develop resistance to insecticides very quickly. Rotating spinosad and abamectin for melon thrips control can defer the development of resistance.

Pepper weevil Field sanitation.

Imidacloprid (Admire 2F) at 24 fl. oz. per acre OR Oxamyl (Vydate 2SL) at 2 to 4 pt. per acre OR permethrin (Ambush 2EC, 25WP, or Pounce 3.2EC, 25WP) at 12.8 fl. oz. per acre for Ambush 2EC, 8 fl. oz. per acre for Pounce 3.2EC, 12.8 oz. per acre for 25WP.

Treatment threshold = 1 adult pepper weevil per 400 terminal buds sampled (2 buds per plant).

See Hawaii Pesticide Information Retrieval System for Information on peppers

Timely plow down of crop residue reduces weevil pressure.

Imidacloprid soil injected at first flowering. 21 day PHI.

7 day PHI for oxamyl.

3 day PHI for permethrin. Check label for limit on number of applications allowed per crop season.

Table 3. Weed Control Recommendations.

Control Measure(s)

Rates

Comments

Napropamide (Devrinol 50DF or 2EC)

See Hawaii Pesticide Information Retrieval System for Information on peppers

For low organic matter soils (<2% OM) use 2 lb. per acre DF or 2 qt. per acre EC, 4 lb. or 4 qt. per acre for other soils. Preplant incorporated/Preemergent.

Grass control + some broadleaf control.

Incorporate to depth of 2 to 3 inches after application to prevent deterioration.

Paraquat (Gramoxone Extra 2.5E)

See Hawaii Pesticide Information Retrieval System for Information on peppers

2 to 3 pt. per acre plus 0.125% nonionic surfactant.

Use shielded spray rig. Pepper plants must be 6 to 10 in. tall.

Post-plant/Postemergent/Directed spray.

Broad spectrum weed control.

30 day PHI.

Sethoxydim (Poast 1.5EC) 1 to 1.5 pt. per acre plus 0.125% nonionic surfactant. Post-plant/Postemergent/Broadcast spray.

Grass control.

20 day PHI.