As a soybean farmer, it is important to protect your crop from a variety of pests, including the girdle beetle. These small, oval-shaped insects are particularly destructive, feeding on soybean roots and causing plant stunting and yield reduction. Here is some information on controlling girdle beetle in soybean crops.
1. Timing is key.
The best time to control girdle beetle is during the egg-laying period, which typically occurs in mid-June to early July. This is when the young larvae are most susceptible to insecticides and other control methods, as they have not yet burrowed into the soil to feed on roots.
2. Scout your fields.
Regular field scouting is essential for identifying girdle beetle infestations early. Look for signs of stunted plants, yellowing leaves, and reduced pod set. Check soil samples for the presence of larvae or adult beetles, which are brownish or black in color and about 1/4 inch long.
3. Use insecticides.
A variety of insecticides are available for controlling girdle beetle in soybean crops. These may include pyrethroids, neonicotinoids, organophosphates, and carbamates. Be sure to follow label instructions carefully and apply treatments when beetles are actively feeding.
4. Practice cultural controls.
Cultural control measures can also help reduce girdle beetle populations. These might include crop rotation, planting resistant varieties, and reducing tillage to encourage the growth of natural predators. Maintaining healthy soil with proper nutrient management can also help keep plants strong and less susceptible to insect damage.
In summary, controlling girdle beetle in soybean crops requires a combination of proactive scouting, careful timing of insecticide applications, and implementation of cultural control practices. By staying vigilant and taking action early, farmers can protect their crops and maximize yields.