Why is abamectin, the "carrying handle" in the pesticide industry, gradually faded away now?

Abamectin integrates bactericidal, insecticidal, acaricidal, and nematicidal functions. Among many pesticide types, it is definitely a star-like existence. The common contents are mainly 1.8%, 2%, 3%, 5%, and 10%. Dosage forms include emulsifiable concentrate, suspension, microcapsule suspension, microemulsion, and 0.5% and 1% granules.
It's just that with the continuous emergence of new pesticides, abamectin, which is known as "the leader" in the pesticide industry, has gradually faded into people's field of vision. profit? Did the crops develop resistance, or did the farmers not know how to use abamectin scientifically?
The reason why abamectin has lost its ability to dominate the market, but it still plays a pivotal role in the control of pesticides and insect pests. (Helicobacter bollworm, Diamondback moth, Beet armyworm, Spodoptera litura, etc.), Hemiptera pest control (whitefly, green leafhopper, aphids), Diptera pest control (Lyriomyza sativa), Thysanoptera pest control (Thrips) and root-knot nematodes have extremely superior control effects.
In the pesticide industry, how many similar products can there be such a broad spectrum of abamectin to control pests, and the effects are quite superior?
The insecticidal mechanism of abamectin is to interfere with the neurophysiological activities of the pests and stimulate the release of y-aminobutyric acid, and this component has an inhibitory effect on the nerve conduction of the pests, and plays the role of stomach poisoning and contact killing on the pests. , Pests appear paralyzed symptoms, do not move and do not eat, and gradually die in about 3 days. Therefore, the insecticidal speed of abamectin is slow, and it does not have the effect of killing eggs.