What are the control methods for the sunflower moth?
How to control the sunflower moth? Here is a detailed introduction to the methods. The sunflower moth larvae bore into and feed on the seeds and the flower disc, seriously affecting the yield and quality of sunflowers. In surveys conducted in different sunflower fields over the past two years, the low seed damage rate was 11.2%, the high was 40.6%, and the average seed damage rate was 21.4%. To improve...
How to control the sunflower moth? Here is a detailed introduction to the methods
The sunflower moth larvae bore into and feed on the seeds and the flower disc, seriously affecting the yield and quality of sunflowers. In surveys conducted in different sunflower fields over the past two years, the low seed damage rate was 11.2%, the high was 40.6%, and the average seed damage rate was 21.4%.
To improve yield and quality, the sunflower moth must be controlled. For chemical control, in the early stage of larval damage, spray with 90% trichlorfon or 50% cartap at 500 times dilution, or spray with 20% fenvalerate or 2.5% deltamethrin at 300 times dilution, or BT emulsion at 300 times dilution. Spray 40-50 ml of solution per flower disc, and spraying again after 5-7 days gives better results. In late July and early August, during the peak emergence period of adults, at 8-9 pm, use a smoke sprayer to release smoke into the field 1-2 times, using 10-15 ml of 80% dichlorvos per mu. This method saves labor and water and is simple and easy to carry out.
Application can also be combined with artificial pollination. Use a powder puff (made from cotton and cardboard material into a puff the size of the flower disc with a raised center), each time picking up 4-5 grams of 5% trichlorfon powder or 2% methyl parathion powder and gently rubbing 4-5 flower discs, with a dosage of 2 kg per mu. Rub again after 5-7 days, and it is better to do this after the dew has dried in the morning each day.
Autumn plowing and winter irrigation are good ways to eliminate overwintering pests. After the first-generation larvae mature, they spin silk and drop from the sunflower disc to the ground, then burrow into the 15-20 cm deep soil layer to overwinter. Carrying out autumn plowing and winter irrigation can eliminate most overwintering pests. In addition, selecting hard-shelled insect-resistant varieties is also a method.
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