Download Agrochemicals from Natural Products (Books in Soils, Plants, by C.R.A. Godfrey PDF

By C.R.A. Godfrey

Deals a radical review of the real agricultural functions of either traditional items and artificial compounds derived from normal items, providing specified info at the isolation, structural stories, organic job and toxicology of those compounds. The increasing region of insecticidal average items is highlighted.

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Additional resources for Agrochemicals from Natural Products (Books in Soils, Plants, and the Environment)

Example text

From this work, 5-(4-chlorophenyl)-2,3-diphenylthiophene(84, Figure V’), as UBIT930 or triarathene, was selected as an experimental foliar acaricide for control of citrus rust mite (Phyllocopfruta oleivora). 84 kg/ ha. Commercial development appears to have been curtailed [179]. Using the terthienyl model, Roush and co-workers synthesized three chemical types with effective miticidal activities [180]. The first was a series of 5-aryl-2-dihalovinylthiophenes. , 5-(3-methylphenyl)-2-dichlorovinylthiophene (85, Figure 17) and 5-(l-naphthyl)-2-dichlorovinylthiophene, were at least as good as a-T (LC,=6 ppm) against the two-spotted spider mite (Tefrunychus urficue).

Of a series of methylketones ranging from 103 " T 102 105 106: R= o o l4 H 108 O+ '0 /W- '0 109 110 r l11 0 ' 113 112 Ho+ph /O 115 116 Figure 22 Insecticidalnatural products. 114 46 ADDOR l-nonanone to 2-pentadecanone applied to filter paper discs,2tridecanone was the most toxic to larvae of the tomato fruitworm, Heliothiszea with an LC,=17 &cm2. Changes in the position of the carbonyl group on the carbon chain did not affect toxicity [215]. 2Tridecanone in wild tomato plants was the major component imparting resistance to the tobacco hornworm and the Colorado potato beetle (@tinotam decemlineata) and less so to H.

In addition to work establishing methods for the synthesis ADDOR 22 SI Ppecidds 0 63 Quhreensine 54 Pipeline Figure 10 Insecticidal unsaturated amides. of these compounds, much of it coming from the laboratory of L. Gombie, some considerable effort had also beenmade to prepare and test syntheticanalogs. These are tabulated in the Jacobson review [loo]. Recently, as a prerequisite to undertaking a synthesis program based on what they describeas insecticidal lipophilic amides, Elliott and co-workers developed a broader definition of the inclusive structure [lola].

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