Method for supression of infection by plant virus

A method for suppressing plant virus infection transmitted by winged pests, the method comprising applying, to a crop, a composition comprising:

• (a) a glycerin acetic acid fatty acid ester represented by formula (I):
• CH2OCO(CH2)1—CH3
• CHOCO(CH2)m—CH3
• CH2OCO(CH2)n—CH3 (I)
• wherein l is an integer of 0 to 16, m is an integer of 0 to 16, n is an integer of 0 to 16, and one or two of l, m, and n are 0;
• and
• (b) at least one insecticidal compound selected from the group consisting of nitenpyram, dinotefuran, pyridaben, spiromesifen, buprofezin, fenpyroximate, acetamiprid, milbemectin, tolfenpyrad, flonicamid, pymetrozine, pyrifluquinazone, clothianidin, imidacloprid, thiamethoxam, sulfoxaflor, pyridalyl, cyclaniliprole, chlorantraniliprole, cyantraniliprole, fenpropathrin, fenitrothion, ethofenprox, teflubenzuron, thiacloprid, lufenuron, spirotetramat, pyriproxifen, hydroxypropyl starch, saccharified reduced starch, sodium oleate, flupyradifurone, triflumezopyrim, tetraniliprole, fluxametamide, broflanilide, spinetoram, pirimiphos-methyl, emamectin benzoate, methidathion, chinomethionate, cartap, thiocyclam, spinosad, novaluron, lepimectin, acequinocyl, fenbutatin oxide, tebufenpyrad, DBEDC, chlorfluazuron, and salts thereof.