Pyridalyl lepidopterous pests

H. Ikegami, K. Umeda, K. Tsushima, N. Matsuo, The discovery of pyridalyl a novel insecticidal agent for controlling lepidopterous pests, Pest Manage. Sci. 60 (1)... 

Pyridalyl Discovery, Insecticidal Activity, and Mode of Action 11115 Table 30.3.3 Insecticidal activity of pyridalyl against lepidopterous pests. 

Several field evaluations carried out to date have proved that pyridalyl at rates between 100 and 220 g-a.i. ha" or 10 g-a.i. hi" provides excellent control of lepidopterous pests on vegetables or cotton. In addition, pyridalyl is being developed for control of Liriomyza spp. and Thrips palmi in vegetables and ornamentals. The labeled or proposed crops in Japan or USA are expressed in Table 30.3.6. No crop injuries have been reported to date. 

Pyridalyl controls a wide variety of lepidopterous pest strains such as the diamondback moth (Plutella xylostella) which is resistant to various existing insecticides (8). This insecticide is also effective against thysanopterous pests. Moreover, it does not exert an adverse effect on various beneficial arthropods such as natural predator insects (e.g., Oristar-A ) and honeybees. Therefore, this novel insecticide is expected to be a usefiil material for controlling lepidopterous and thysanopterous pests in IPM and insecticide resistant management programs. 

Discovery of Pyridalyl A Novel Compound for Lepidopterous Pest Control... 

Table 5. Insecticidal Activity of Pyridalyl against Lepidopterous Pests...

Pyridalyl resulted from a major synthetic program based on a series of lead conq)ounds and has proven to be very active against the larvae of some inq>ortant pests of cotton and vegetable crops. Pyridalyl also controls insecticide-resistant strains of lepidopterous pests as well as susceptible strains. It produces unique insecticidal symptoms so t it may have a different mode of action from any other existing insecticides. Pyridalyl is safer to mammals and various beneficial arthropods so that it Avill provide an mq)ortant tool in IPM and insecticide resistant management programs. Pyridalyl will become a safer chemical, and certainly contribute to establishment of sustainable chemistry. 

Extensive field trials have been carried out over several years on key target pests such as P, xylostella and H. virescens and pyridalyl has proven to be an outstanding insecticide. Pyridalyl shows very good efficacy for control of various lepidopterous and Ihysanopterous pests on cotton and vegetables without any phytotoxicity in practical treatment which range from 83 to 300g AI haC 8). 

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