Insecticide For Onion
Onion thrips (Thrips tabaci)
Western flower thrips (Frankliniella occidentalis)
Pest description and crop damage
See:
Common Pests of Vegetable Crops
Thrips infestations can reduce onion yield by as much as 20%. Onion thrips also vector Iris Yellow Spot Virus. Onion thrips thrive in hot, dry conditions and are usually more damaging where these conditions prevail most of the production year.
Biology and life history
See:
Common Pests of Vegetable Crops
Pest monitoring Although thrips feeding during the early bulbing stage is the most damaging to yields, thrips must be controlled before onions reach this stage. Otherwise, populations might exceed levels that can be controlled adequately.
In California, a reliable means of evaluating thrips populations is to randomly sample entire onion plants. Larva stages tend to congregate around the newest leaves of the plant. Sample at least five plants from four separate areas of the field. Early in the season, an average of 2 thrips per plants warrants control measures. A threshold of 20 thrips per plant mid-year (lower for very young plants and higher for larger mature plants) has been used successfully for dry bulb fresh market and drying onions. The marketability of green onions (those marketed fresh with the leaves attached) is severely reduced by thrips scarring. Apply treatments at the first sign of thrips feeding.
Management-cultural control
Avoid planting onions near grain fields, if possible, because thrips numbers often build up in cereals in spring. Onion grown with overhead irrigation tend to have lower thrips numbers as thrips tend to be washed from the plant to some extent with heavy irrigation or rains.
Management-chemical control: HOME USE
- acetamiprid
- azadirachtin (neem oil)-Some formulations are OMRI-listed for organic use.
- capsaicin-Some formulations are OMRI-listed for organic use.
- deltamethrin
- gamma-cyhalothrin
- insecticidal soap-May require several applications. Some formulations are OMRI-listed for organic use.
- kaolin-When applied as a spray to foliage and stems it acts as a repellent to some insect pests. Some formulations are OMRI-listed for organic use.
- lambda-cyhalothrin
- malathion
- permethrin
- pyrethrins-Some formulations are OMRI-listed for organic use.
- spinosad-Some formulations are OMRI-listed for organic use.
- zeta-cypermethrin
Management-chemical control: COMMERCIAL USE
Thorough coverage is essential for control, as most thrips feed in protected areas of the plant.
- abamectin (Agri-Mek 0.15EC ) at 0.009 to 0.019 lb ai/A. PHI 30 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.019 lb ai/A per season.
- acetamiprid (Assail SG) at 0.094 to 0.15 lb ai/A. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.6 lb ai/A per season.
- Chenopodium ambrosioides extract (Requiem 25EC) at 3 to 6 pints formulated product per acre. REI 4 hr. Use high rate when conditions are favorable for heavy pressure. OMRI-listed for organic use.
- cyantraniliprole (Exirel) at 0.088 to 0.133 lb ai/A. PHI 1 day. REI 12 hr. Retreatment interval 5 days. Rotate with other modes of action. Begin applications early for best results. Do not exceed 0.4 lb ai/A per season.
- cyantraniliprole + abamectin (Minecto Pro) at 7 to 10 fl oz/A. PHI 30 days. Do not apply more than two times in a row. Retreatment interval 7 days. Do not apply more than 20 fl oz/A per season (0.18 lb ai/A of cyantraniliprole and 0.038 lb ai/A of abamectin).
- cypermethrin (Holster) at 0.08 to 0.1 lb ai/A. PHI 7 days. Dry bulb onion only. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.5 lb ai/A per season. Do not graze or feed crop residues to livestock.
- deltamethrin (Delta Gold) at 0.018 to 0.028 lb ai/A. PHI 1 day. REI 12 hr. Retreatment interval 5 days. Do not exceed 0.112 lb ai/A per season.
- gamma-cyhalothrin (Declare) at 0.010 to 0.015 lb ai/A. PHI 14 days. REI 24 hr. Retreatment interval 5 days. Do not exceed 0.12 lb ai/A per season. An oil or nonionic surfactant improves control.
- lambda-cyhalothrin (Warrior II) at 0.02 to 0.03 lb ai/A. PHI 14 days. Bulb onion only. Retreatment interval 5 days. Do not exceed 0.24 lb ai/A per season. An oil or surfactant adjuvant improves control.
- Metarhizium anisopliae (Met 52EC) at 40 to 80 fl oz/100 gal as drench or 0.25 to 2 quarts/A. PHI 0 days. REI 4 hr.
- methomyl (Lannate SP) at 0.9 lb ai/A. PHI 7 days. REI 48 hr. Do not exceed, per season 5.4 lb ai/A for green onion or 3.6 lb ai/A for dry bulb onion. Limit 8 treatments per season. Retreatment interval 5 days.
- oxamyl (Vydate L) at 0.5 to 1 lb ai/A. PHI 14 days. REI 48 hr. Dry bulb only. Do not harvest tops. Do not exceed 4.5 lb ai/A per season. Suppression only.
- permethrin (Ambush 25WP) at 0.15 to 0.3 lb ai/A. PHI 1 day. REI 12 hr. Dry bulb onion only. Do not exceed 2 lb ai/A per season.
- pyriproxyfen (Knack) at 0.067 lb ai/A. PHI 3 days. REI 12 hr. Do not exceed 0.134 lb ai/A per season. Retreatment interval 14 days.
- spinetoram (Radiant SC) at 0.047 to 0.078 lb ai/A. PHI 1 day. Retreatment interval 4 days. Do not exceed five applications or 0.234 lb ai/A per season. Follow resistance management procedures on the label.
- spinosad (Success) at 0.063 to 0.125 lb ai/A. PHI 1 day. REI 4 hr. Retreatment interval 4 days. Do not exceed 0.45 lb i/A per season. For suppression. Some formulations are OMRI-listed for organic use.
- spirotetremat (Movento) at 5 fl oz/A. PHI 3 days. Retreatment interval 7 days. REI 24 hr.
- tolfenpyrad (Torac) at 0.24 lb ai/A. PHI 7 day. REI 12 hr. Retreatment interval 7 days. Limit 3 treatments per year. Do not exceed 0.73 lb ai/A per year.
- zeta-cypermethrin (Mustang) at 0.0375 to 0.05 lb ai/A. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not graze or cut for feed. Do not exceed 0.25 lb ai/A per season.
Pesticide resistance management Resistance to organophosphate and pyrethroid insecticides has been documented in several states and is suspected in California. For this reason, alternate insecticides from different chemical families when multiple treatments are needed during a year. Be sure to use surfactants when recommended by the label as thrips reside down in the neck of the onion plant and contact of the chemistry to thrips is important.
Insecticide For Onion
Onion is a common vegetable that is used in many dishes. Onion is one of the most significant vegetables that we use in our daily life. It has many health benefits and can be used as a medicine for common diseases.
Onion is cultivated from the bulb of an onion plant. They are divided into two types: white onions and yellow onions. The onion is a bulb or root vegetable that is usually eaten raw or cooked to give it a strong flavor. Onions can be eaten raw as well as cooked, but they have many health benefits when they are cooked properly.
List Of Insecticide For Onion
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| Item Dimensions | |
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| Width | 2.6 Inches |
| Length | 2.6 Inches |
| Weight | 0.661386786 Pounds |
| Release Date | 2019-10-07T00:00:01Z |
- Cyfluthrin 6.0%
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| Item Dimensions | |
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- Ortho Home Defense Insect Killer for Indoor & Perimeter2 with Comfort Wand kills ants, cockroaches, spiders, fleas, ticks and other listed bugs; the formula is odor free, won’t stain, and keeps listed bugs out
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| Color | White |
| Item Dimensions | |
| Height | 4.88 Inches |
| Width | 12 Inches |
| Length | 8.95 Inches |
| Weight | 0.73 Pounds |