In view of the fact that the population of the giant borer has increased significantly in recent years and the actual needs of the attending chemicals are not clear, researchers from the School of Plant Protection, Nanjing Agricultural University and the Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences have recently measured the effects of different types of chemical agents on the eggs and 3 instars of the Sesamia inferens . On the basis of the contact toxicity of larvae and the stomach toxicity to newly hatched larvae, field control experiments were carried out on two kinds of pesticides with high toxicity. What is the effect of emamectin and chlorantraniliprole in controlling Sesamia inferens ?
The test results showed that among the 13 kinds of insecticides measured indoors, abamectin, beta-cypermethrin, methylamino abamectin benzoate (carbamectin) and chlorantraniliprole were effective in killing three kinds of insects. Insect activity was higher;
The field test showed that the control effect of 5% A-dimensional salt water dispersible granules at 11.25 g/ha was the best, the insecticidal effect was 95.54%, the ear protection effect was 97.37%, and the 20% chlorantraniliprole suspension agent 30 g/ha insecticidal effect The effect was 89.61%, and the ear protection effect was 95.33%, which were significantly better than the corresponding control effects of the control agent 40% chlorpyrifos EC 48 g/ha or 92.1% insecticide 1,200 g/ha.
It is worth noting that the new cis-nitromethylene compound epoxidil, created by the Institute of Medicinal Chemical Engineering of East China University of Science and Technology, not only has high insecticidal activity against piercing-sucking pests such as rice planthoppers and aphids, but also has high insecticidal activity. In this study, it was also shown for the first time that it has high activity against the eggs and larvae of the noctuid borer pest, the larvae, and may have a good combined effect on the lepidopteran pests in the field.
Since the giant borer is a local overwintering pest, it has a large regional genetic variability, and its host crops have a wide range, and it is easy to produce drug resistance when a single agent is used in the control.
Therefore, the researchers suggest that, in addition to the control of rice borer, other dryland crops such as corn and vegetables can be used in combination or alternately with pyrethroids with different mechanisms of action, such as beta-cypermethrin, so as to be effective. To avoid the large borer in the area from becoming resistant to a single agent, to achieve the purpose of effective pest control.
