The location of zeros of a quasi-modular form of weight 2 for Γ0+(p) for p = 2,3

Let E2(z) be the Eisenstein series which is quasi-modular of weight 2 for SL2(Z). For each p=2,3, we show that there are infinitely many Γ0+(p)-inequivalent zeros of the quasi-modular form E(z):=E2(z)+pE2(pz) of weight 2 for Γ0+(p) and give the estimates of their locations numerically.