Prevention and Control Methods for Onion Pests
Onion is an annual herbaceous plant with a large planting area at present. Improper management of onion planting can easily lead to pest infestation, causing serious yield reduction. Let's learn about the methods of prevention and control of onion pests together.
Method 1: Physical Control
Cover the onion cultivation with ground film, use silver-gray ground film to avoid aphids, set up a frequency-vibration insecticidal lamp every 2.7 hectares, use a 1:1:3:0.1 solution of grain vinegar water 90% diatomaceous earth crystal solution, and place 3-4 pots of lure-killing adults per mu.
Method 2: Crop Rotation
Implement crop rotation between onions and crops such as wheat and corn in the Poaceae family to reduce pest occurrence.
Method 3: Deep Plowing and Sunning
Before planting onions, deep plow and sun the ridges to reduce the number of soil residual pathogen populations.
Method 4: Biological Control
Use biological pesticides to control pests on onions. Use 50-80 milliliters of 1.8% avermectin emulsifiable concentrate per mu, or 2-3 kilograms of BT emulsion to control onion fly larvae.
Method 5: Chemical Control
Chemical control of onion pests mainly targets root pests such as onion flies, seed flies, and leek maggots, but in recent years, pests such as American spotted wing flies and thrips have caused serious damage. For onion root pests, spray 2000 times effective chlorfenapyr at the root, or use 5000 times Tian Da emamectin benzoate solution for control. When other pests occur, spray 3000 times 2% Tian Da avermectin solution for control.
Above are the methods for preventing and controlling onion pests. Onion pests have a great impact on the quality and yield of onions, so growers need to do a good job in pest control management.
How to Protect Onions from Pests
Onions, being vulnerable to various pests, require careful management to ensure a healthy yield. Here are some effective methods for protecting onions from pests:
1. Physical Control
Utilize ground film coverings for onion cultivation to deter pests like aphids. Additionally, installing frequency-vibration insecticidal lamps and using solutions such as grain vinegar water can help in trapping and killing adult pests.
2. Crop Rotation
Implement a crop rotation strategy, alternating onion cultivation with other crops like wheat and corn from the Poaceae family. This practice disrupts the life cycle of pests and reduces their population.
3. Deep Plowing and Sunning
Prior to onion planting, deep plow the soil and expose it to sunlight to diminish the population of soil-borne pathogens, thereby minimizing pest infestation.
4. Biological Control
Employ biological pesticides to manage onion pests. Avermectin emulsifiable concentrate or BT emulsion can be used to effectively control pests such as onion fly larvae.
5. Chemical Control
For more severe infestations, chemical control may be necessary. Apply chlorfenapyr or emamectin benzoate solution at the root to combat root pests like onion flies. Other pests can be targeted with appropriate chemical treatments.
By implementing these methods, onion growers can effectively protect their crops from pests, ensuring a healthy and abundant harvest.
