Post-Harvest Fumigation Of Tubers For The Control Of Sweet Potato Weevil

Antonio  L. Acedo,; E  C. Manoto,; O  K. Bautista,

Post-Harvest Fumigation Of Tubers For The Control Of Sweet Potato Weevil

Antonio L. Acedo | E C. Manoto | O K. Bautista

Abstract:

The use of ethylene dibromide (EDB) and phostoxin in controlling sweet potato weevil was evaluated. Larvae and pupae were effectively controlled when EDB was used at the rate of 32 ml/cu m. However, phostoxin at 10.5 tablets/cu m was more effective than EDB in controlling the different developmental stages of the weevil. This showed the greater potential of phostoxin in controlling the pest aside from its superior characteristics as compared to that of EDB. Phostoxin is less toxic (LD 50 = 50 ppm) than EDB (LD 5 0 = 20 ppm), and is easier to apply, hence, an inexpensive fumigation chamber could readily be rigged up in rural areas utilizing this fumigant.

References:

BERGONIA, H.I. and DILOY, C.C. 1974. Ethylene dibromide fumigation destroys mango fruit fly and melon fruit fly in green mature mangoes. Plant Prot. News. 3(12): 162.
BUREAU OF PLANT INDUSTRY. 1978. Fumigants. PPQ Treatment Manual. (Sec. 1 -Part 1). Rev. Aug. 1978. p. 11.
CLAYPOOL, L.L. and VINES, H.M. 1956. Commodity tolerance studies of deciduous fruits to moist heat and fumigants. Hilgardia 24(12): 320-332.
EAKS, I.L., ECKERT, V.W. and ROTACHER, C.N. 1958. Ammonia gas fumigation for control of Rhizopus rot on peaches. Plant Dis. Reptr. 42(7): 848.
EAKS, I.L. and SINCLAIR, W.B. 1955. Respiratory response of avocado fruits to fumi-gation effective against eggs and larvae of fruit flies. J. Eco. Entom. 48: 369-374.
GONZALES, S.S. 1955. The sweet potato weevil, Cylas formicarius elegantus (Fabr.) Phil. Agric. 14(5): 257-258.