Synthesis, Characterization, and Agricultural Biological Activities of 5-Fluoro-2-hydroxy Butyrophenone

Table 3

Inhibition of 5-fluoro-2-hydroxy butyrophenone on the seedlings growth of two plants.

Receptor plant species	Toxicity regression equation^a	EC^b50/mg·L^−1 (95% confidence interval)	Chi-square^c
Lactuca sativa
Roots	𝑌=−3.379+1.732𝑋	89.36 (75.98–106.64)	2.147
Hypocotyls	𝑌=−2.003+1.096𝑋	67.25 (52.66–86.58)	0.501
Echinochloa crusgalli
Roots	^d	^d	^d
Hypocotyls	𝑌=−2.967+1.477𝑋	102.20 (84.56–127.32)	3.933

aPROBIT model: 𝑌 (probit) =intercept+𝐵𝑋 (covariates 𝑋 are transformed using the base 10 logarithm).
^bPyrazosulfuron-ethyl displayed better herbicidal activity against Echinochloa crusgalli, with the EC₅₀ value of 7.18mg·L⁻¹ for the hypocotyls inhibition.
^c𝜒²<𝜒²_(3,0.05)=7.815 shows that toxicity regression equations obtained can be used for predictions of the inhibition effects.
^dBecause of Hormesis effect, no calculation was done.