Synthesis and synergistic activity of dillapiole based pyrethrum synergists

Syntheses and Synergistic Activity of Some Pyrethrum Synergists from Dillapiole

“…Compounds possessing two and more mdp groups, XIV, XVI, and XVIII are poorer synergists as has been noted earlier. 16) The O-alkyl ethers corresponding to XI have been reported 9 ) to have high activity. It is interesting to note that the change from 0 to S in these ethers reduces the activity rather very strongly.…”

Synergistic potential of dillapiole-rich essential oil with synthetic pyrethroid insecticides against fall armyworm

“…This species, with its variable dillapiole levels (MAIA et al, 1998), is abundant in the western Amazon (PIMENTEL et al, 1998), and is the most promising option to replace PBO (WALIA et al 2004). Most dillapiole-producing plants; however, have constraints with regard to cultivation at the industrial level, and availability on the market (TOMAR et al, 1979). To further investigate a promising alternative to PBO, this study compared PBO and P. aduncum essential oil effects (PAEO) in several insecticide formulations (alpha-cypermethrin, beta-cypermethrin, fenpropathrin, and gamma-cyhalothrin) on the synergy and response homogeneity of Spodoptera frugiperda (J.E.…”

Adulticidal Activity of Dillapiol and Semi-synthetic Derivatives of Dillapiol against <i>Aedes aegypti</i> (L.) (Culicidae)

“…Dillapiol (1) exhibits synergism with several classes of substances used in insect control. For example, synergism of 1 was observed with pyrethrins (factor of synergism 2.0) against the wheat flour beetle Tribolium castaneum (Tomar et al, 1979a;1979b) with α-terthienyl against larvae of Aedes atropalpus (LC 50 41.1 ng/mL) and factor of synergism 1.9 (Majerus, 1997;Alibhai, 1999;Belzile et al, 2000) with pyrethrin and carbaryl against adults of the red flour beetle Tribolium castaneum (Larocque et al, 1999). Also, 1 exhibits synergism with the pyrethroids deltamethrin and cypermethrin providing 70% and 100% mortality in adult A. aegypti in 90 min and 15 min, respectively.…”

“…For example, derivatives 2-6 ( Figure 1) and other derivatives of 1 exhibited in vitro synergism (2.8~5.0 fold increased effects) with pyrethrin insecticides against the wheat flour beetle Tribolium castaneum (Tomar et al, 1979a;1979b;Mukerjee et al, 1979) and with α-tertienyl in larvae of Aedes atropalpus where derivative 5 showed synergism as evidenced by 1.5 fold increased activity (Majerus, 1997;Belzile, 2000).…”