Huang Guoping, a DJI pilot, used a new DJI T30 Agras drone to conduct direct seeding of rice on his 9.23-acre farm in Jiangxi Province. Now, each seed has grown into a small seedling, evenly distributed in the field, and the current rice crop has entered the pest control stage.
The T30 Agras drone is equipped with 16 pressure sprinklers and has a strong downward pressure wind field, allowing it to spray liquid pesticides directly to the roots of crops. It can also minimize the drift of liquid pesticides for penetrative spraying and even coverage. In order to implement the entire application and management process, today, the pilot continued to use Agras T30 to carry out pest control operations on the paddy fields where Agras T30 had previously sown the seeds.
Operation Plot Information
| Date | May 19, 2021 | Operation Location | Xinyu, Jiangxi |
| Operation Topography | Plain | Wind Speed | Level 1-2（0.3-3.3m/s） |
| Operation Weather | Sunny | Temperature | 21~28℃ |
Pesticide Information
| Ingredient Name | Phoxim triazophos | Avermectins | British Fruit Green Peel Orange Oil |
| Active Ingredients | Phoxim content: 10% Triazophos content: 10% | Avermectins active ingredient content: 3% | Adjuvant. It accelerates penetration and can quickly penetrate the plant epidermis and stomata, quickly dissolve the wax layer on insect body surfaces, and improve leaf gloss. |
| Dosage Form | emulsifiableconcentrate | Emulsion in water | |
| Consumption per Acre | 600 ml | 600 ml | 60 ml |
The main targets of this control operation were rice leaf rollers and striped rice borers. Abamectin (3%) and phoxim ·triazophos (20%) were used. Abamectin is a widely used biological pesticide with high activity against lepidopteran pests. It can be used for the control of striped rice borers and rice leaf rollers. 20% phoxim·triazophos is a compound insecticide formulated with 10% phoxim and 10% triazophos. It has contact-killing, gastric toxicity, and osmotic effects, but no systemic absorption effect. It is fairly effective in controlling striped rice borers.
Parameters
| Model | T30 agras drone | Flight Speed | 5.7 m/s |
| Height Relative to Crops | 2.2 m | Row Spacing | 7.5 m |
| Consumption per Acre | 9 L | Operation Mode | Flightpath Mode |
Introduction to Rice Pests
The rice leaf roller, also known as the rice case worm, is one of the main pests in the rice-producing areas of China and is very common in various rice areas. Its larvae are very harmful to rice. By rolling leaves into longitudinal bracts, the larva hides in them to feed on the upper epidermis and mesophyll, leaving only the white lower epidermis. If such damage occurs during the seedling stage, the normal growth of the rice will be affected, and the rice may even wither. If such damage occurs during the tillering stage or jointing stage, the tillering will be reduced, the plant shortened, and the growth period delayed. If such damage occurs to boot leaves after booting, especially from heading to the full heading stage, it will affect flowering and fruiting, increase the rate of empty shells, and decrease the thousand kernel weight.
Rice borer
The name “rice borer” generally refers to rice stem borers that bore into and damage the stems of rice plants. The main types are pink rice borers, striped rice borers, and yellow rice borers. In rice fields, these pests mainly feed on the stems of rice, causing withered seedlings, withered booting, white heads on the rice, and other problems. If not treated in time, the yield and final quality of rice will be affected. For some areas with high resistance, compound agents can be selected for control. For example, some farmers have reported that a certain pesticide works well for them, even though it does not work well in other regions. Therefore, attention should be paid to the reasonable selection of pesticides to avoid allowing the pests to build up resistance, which can result in poor control effects.
Notes for Operation and Pesticide Application
1. In the process of preventing and controlling rice diseases and pests, it is necessary to clarify the targets and adopt different pesticide control measures according to the different types of diseases and pests in the field.
2. Pesticide application should be conducted in accordance with the pesticide instructions. Alternation and rotation of pesticides should be strengthened to avoid the circulation and continuous use of the same pesticide across different rice areas or within the same rice area. This can effectively delay the occurrence of resistance.
3. During operation, try to avoid the use of powder, which can clog the nozzles.
4. For areas with high rainfall, adjuvant can be added to the pesticides when necessary. This makes it harder for the pesticides to be washed away and ensures their efficacy.
