When seeing their crops destroyed by pests, the first thing that comes to mind is to use pesticides to kill insects. Due to the resistance of some pesticides, various products that have been silent for more than ten years have come to the fore, and product compounding and new uses of old drugs are becoming more and more common. Among them, the most popular and widely used are the five ingredients of emamectin benzoate, cypermethrin, indoxacarb, fenburon, and lufenuron. In this article, we will focus on the ingredient lufenuron.
Lufenuron is mainly used to control pests such as leaf rollers, diamondback moths, cabbage worms, beet armyworms, Spodoptera litura, whiteflies, thrips, and rust ticks. It is particularly outstanding in controlling rice leaf rollers. It has particularly excellent efficacy against resistant pests such as beet armyworms, Spodoptera litura, and cotton bollworms.
Lufenuron has stomach poison and contact killing effects, no systemic absorption, and strong egg killing. After the pests come into contact with the agent and feed on the leaves with the agent, their mouths will be anesthetized within 2 hours, and they will stop feeding, thus stopping harming the crops. The peak of dead insects will be reached in 3 to 5 days. The effective period is about 10 days. It has a mild effect on the adults of beneficial insects and predatory spiders.
And the egg-killing effect is also very good. The liquid can be sprayed on the leaves of crops or on the eggs to kill the eggs directly. More than 95% of the eggs laid by pests within 48 hours after the leaves are treated with the agent cannot hatch; the eggs laid within 10 days cannot hatch normally; although the adults cannot die after contacting the agent or feeding on the dew containing the agent, their egg laying and egg hatching rate are significantly reduced, which can effectively reduce the insect source.
Use of compound preparations: Through the complementation of two single agents, pests can be better controlled.
To improve the control effect, emamectin benzoate + lufenuron can be used to control pests that have already developed resistance, and the effect is particularly outstanding. After compounding, not only the control range of the two single agents is complemented, but also the different insecticidal mechanisms delay the resistance of pests. This formula can quickly control pests, and the lasting effect is relatively long. It has the dual effects of killing insects and eggs. It should be noted that we use the medicine during the peak period of egg hatching of pests-the high incidence period of low-age larvae, which can control the eggs at the same time, effectively reduce the base number of insects, and thus bring a relatively long lasting effect.
After mixing or compounding, the effect on pests such as beet armyworm, cabbage worm, cutworm, rice leaf roller is relatively good, and the lasting effect can reach more than 20 days.
Lufenuron·Chlorpyrifos (mainly for the control of beet armyworm), Lufenuron·Chlorpyrifos (mainly for the control of cotton bollworm), Avermectin·Lufenuron (mainly for the control of rust ticks), etc.
Then for Lufenuron, let's summarize its shortcomings for everyone:
1. Insect control range: Although Lufenuron is more effective against eggs and larvae, its effect on older larvae is relatively not very good. Therefore, if there are more older larvae, it is recommended to use it in combination with other agents, such as Chlorpyrifos. We use drugs during the peak period of egg hatching of pests - the high incidence period of young larvae, which can prevent and control the eggs at the same time, effectively reduce the base number of insects, and thus bring a relatively long lasting effect.
2. Low rapidity: Lufenuron generally takes 3-5 days to reach the peak of insecticide after insecticide, so some high-rapidity drugs should be compounded. For example, emamectin benzoate, etc.
Summary: Lufenuron has good insecticide effect and a wide range of prevention and control. But we should also pay attention to the mixing and cross-use of drugs to prevent resistance! Pay attention to the best time for insecticide, and kill the eggs at the same time to effectively reduce the base number of pests.
