TABLE 2 in Efficacy of Aqueous Extracts from Syzygium aromaticum, Tephrosia vogelii, and Croton dichogamus against Myzus persicae on Brassica oleracea in Northern Tanzania

TABLE 2: Mean population of M. persicae per crop in response to treatments applied.
Site and treatments2019 wet seasonSeasons2020 wet seasonSiteTengeru0.59 ± 0.11a0.67 ± 0.08aBoro0.51 ± 0.08a0.63 ± 0.09aTreatmentsWater2.27 ± 0.25a2.07 ± 0.12aWater + soap1.90 ± 0.24ab2.05 ± 0.09aSynthetic pesticide0.21 ± 0.10de0.11 ± 0.03gC. dichogamus (1%)0.64 ± 0.08bc0.57 ± 0.05bcC. dichogamus (5%)0.35 ± 0.03de0.48 ± 0.03cdC. dichogamus (10%)0.39 ± 0.08cde0.33 ± 0.03efgS. aromaticum (1%)0.44 ± 0.04cd0.79 ± 0.09bS. aromaticum (5%)0.32 ± 0.05de0.51 ± 0.04cdS. aromaticum (10%)0.23 ± 0.03de0.33 ± 0.04efgT. vogelii (1%)0.32 ± 0.02de0.72 ± 0.05bT. vogelii (5%)0.21 ± 0.04de0.44 ± 0.04deT. vogelii (10%)0.15 ± 0.02de0.23 ± 0.02fgMixed plants (2.5%)0.20 ± 0.05de0.36 ± 0.06defMixed plants (5%)0.12 ± 0.03e0.16 ± 0.04g2-way ANOVA(F-statistics)Site2.51 ns∗∗∗2.47 ns∗∗∗Treatments42.19132.71Location ∗ treatments1.18 ns2.18 ns
Each value is a mean ± standard error of eight replicates, ∗, ∗∗, and ∗∗∗: significant at P ≤ 0.05, P ≤ 0.01, and P ≤ 0.001, respectively, and ns means not significant. Means within the same column followed by the same letter (s) are insignificantly at P � 0.05 from each other using Fisher’s Least significant Difference (LSD) test.