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Several Larvacide Comparison

The effects of the five ingredients have their own advantage, and they cannot be generalized. We makes a simple analysis and comparison of the five components from the following aspects。
Chlorfenapyr: It acts on the mitochondria of cells in insects and acts through the multifunctional oxidase in the insects, which mainly inhibits the conversion of enzymes.
Indoxacarb: is a highly effective oxadiazine insecticide. It blocks the sodium ion channels in insect nerve cells, so that nerve cells lose their function. It causes the pests to dyskinesia, unable to eat, paralyze and eventually die.
Tebufenozide: It is a new type of non-steroidal insect growth regulator and a newly developed insect hormone insecticide. It has an agonistic effect on the ecdysone receptor of pests, can accelerate the abnormal molting of the pests, and inhibit feeding, leading to physiological disorders of the pests and death from starvation.
Lufenuron: the latest generation to replace urea insecticides. It is a benzoylurea insecticide developed and produced by Syngenta. It kills pests by acting on insect larvae and preventing the peeling process.
Emamectin benzoate: often referred to as “emamectin salt” in the industry, it is a new type of high-efficiency semi-synthetic antibiotic insecticide synthesized from the fermented product abamectin B1. It has been used for a long time. Currently common pesticide products.
1.Comparison of mode of action
Chlorfenapyr has stomach poision and contact poision, has strong permeability on plant leaves, has a certain systemic effect, and does not kill eggs.
Indoxacarb has stomach poision and contact poision, no systemic effect, and does not kill eggs.
Tebufenozide has no osmotic effect and phloem systemic activity. It is mainly effective through stomach poision. At the same time, it also has a certain degree of contact and has strong egg killing activity.
Lufenuron has stomach toxicity and contact poision effect, no systemic inhalation, and strong egg killing.
Emamectin benzoate is mainly stomach poison and has contact effect. Its insecticidal mechanism is to hinder the motor nerve of pests.
All five are stomach poision and contact poision. Penetrating agent/Spreading agent (pesticide adjuvant) will greatly improve the killing effect when spraying.
2.Comparison of insecticidal spectrum
Chlorfenapyr has excellent control effects on drilling, sucking and chewing pests and mites, especially against the diamondback moth, beet armyworm, Spodoptera litura, leaf roller, Liriomyza sativa, Pea pod borer, thrips, spider mites, etc. have significant effects;
Indoxacarb is mainly used to control lepidopteran pests such as beet armyworm, Plutella xylostella, Pieris rapae, Spodoptera litura, Helicoverpa armigera, Helicoverpa armigera, leaf rollers and other lepidopteran pests.
Tebufenozide has unique effects on all lepidopteran pests, and has special effects on resistant pests such as cotton bollworm, cabbage caterpillar, diamondback moth, and beet armyworm.
Lufenuron is mainly used to control leaf roller, plutella xylostella, cabbage caterpillar, beet armyworm, Spodoptera litura, whitefly, thrips, rust tick and other pests. It is particularly prominent in the control of rice leaf roller.
Emamectin benzoate has extremely high activity on the larvae of lepidopteran insects and many other pests and mites. It has both gastric toxicity and contact killing effects. For lepidopteran armyworm, potato tuber moth, beet armyworm, apple stupid moth, peach heartworm, rice stem borer, rice stem borer, cabbage caterpillar, European corn borer, melon leaf roller, melon borer, melon wild Stem borer and tobacco budworm have good control effect. Especially effective for Lepidoptera and Diptera.
Insecticidal broad-spectrum:
Emamectin benzoate>Chlorfenapyrl>Lufenuron>Indoxacarb> Tebufenozide
3.Comparison of the speed of control
Chlorfenapyr the pest activity becomes weak one hour after spraying, spots appear, the color changes, the activity stops, coma, collapses, and eventually leads to death, reaching the peak of dead insects within 24 hours.
Indoxacarb, insects stop feeding within 0 to 4 hours, and then become paralyzed, and the coordination ability of insects will decrease (which can cause larvae to fall from the crop), and generally die within 1 to 3 days after the medicine.
Tebufenozide can interfere with and destroy the balance of the original hormones in the insects after feeding, and lead to refusal to eat. Generally, pests stop harming after 5 hours of feeding, peeling reaction occurs in 1-2 days, and incomplete peeling occurs in 2-3 days , Anti-feeding, loss of water throughout the body, and eventually death, reaching the peak of dead insects in about 3 days.
lufenuron, the pests contact the chemical and eat the leaves with the chemical, the mouth is anesthetized within 2 hours, and the feeding is stopped, thereby stopping the damage to the crop, and reaching the peak of dead insects in 3 to 5 days.
Formate, the pests have irreversible paralysis, stop eating, and die after 2-4 days, and the insecticidal speed is slow.
Insecticidal rate: Chlorfenapyr> Indoxacarb> Tebufenozide> Lufenuron> Emamectin benzoate
4.The duration of comparison
Chlorfenapyr does not kill eggs, and only has outstanding control effect on advanced instar insects. The insect control time is about 7 to 10 days.
Indoxacarb does not kill eggs, it kills all lepidopteran pests, and its control effect is about 12 to 15 days.
Tebufenozide has good egg killing ability, and chemical sterilization will be formed after pests eat, so the lasting period is longer, generally about 15-30 days.
Lufenuron has a powerful egg-killing effect, and the insect control time is relatively long, up to 25 days.
Emamectin benzoate has a long lasting period, 10-15 days for pests and 15-25 days for mites.
Effective duration: Emamectin benzoate>Lufenuron>Tebufenozide>Indoxacarb>Chlorfenapyr
5.Comparison of leaf preservation rate
The ultimate goal of insecticide is to prevent pests from harming crops. As for the speed or slowness of pests’ death, it is just a matter of the perception of the common people. The leaf preservation rate is the ultimate indicator of product value.
To compare the control effect of rice leaf roller, lufenuron leaf retention rate can reach more than 90%, emamectin benzoate is 80.7%, indoxacarb is 80%, tebufenozide is about 65%, and Chlorfenapyr reaches 65%
Leaf retention rate: Lufenuron> Emamectin benzoate> Indoxacarb> Tebufenozide > Chlorfenapyr
Lufenuron has no phytotoxicity reaction so far. At the same time, the medicament will not cause piercing and sucking pests to become rampant, and it has a mild effect on beneficial insects and predatory spiders.
Chlorfenapyr is sensitive to cruciferous vegetables and melon crops, and is prone to phytotoxicity when used at high temperatures or high doses;
Indoxacarb is highly safe and has no phytotoxicity reaction. Vegetables or fruits can be picked on the second day of application.
Tebufenozide is also highly safe, has no phytotoxicity, and can cause chemical sterilization of some lepidopteran pests after use. At the same time, there will be a second dead insect period after 10 days, and it has no toxic side effects on bees, predatory mites, etc. , So highly secure.
Emamectin benzoate is highly safe for all crops in protected areas or 10 times the recommended dosage. It is an environmentally friendly low-toxic pesticide.
Safety: Emamectin benzoate ≥ Tebufenozide ≥ Indoxacarb> Lufenuron> Chlorfenapyr
7.Cost comparison
Calculated according to the quotations and dosages of various manufacturers in recent years
The comparison of medication cost is: Indoxacarb> Chlorfenapyrl> Tebufenozide> Lufenuron> Emamectin benzoate.
The overall feeling of the five in actual use:
Lufenuron felt very general when used for the first time, but it felt very unusual when used twice in a row.On the contrary, the effect of carnitril is very good for the first use, and the effect is normal after two consecutive use.The effects of emamectin benzoate, indoxacarb and tebufenozide are roughly somewhere in between.