December 1970 S 23 Biological Note on the Injurious Insects of Confections in Aichi Prefecture and the Contribution to the Protective Counterplan Tadahiro NARAFU*1 and Masataka SATO*2 (*1 Aichi Institute of Public Health: 81-1, Kanokoden, Tashiro-cho, Chikusa-ku, Nagoya; *2 Nagoya Women's University: 3-40, Shioji-cho, Mizuho-ku, Nagoya) This is the report on the biology of insect injurious to the confections in Aichi Prefecture by our observation. Injurious insects mostly appear between July and September through the year. We report herewith thirteen species of insect injurious to the confections, of which eight species were directly examined and determined of their specific names. Most important species were Plodia interpunctella Hubner and Oryzaeophilus According to our observation, the packages of thin cellophane and alminium foil were invasive easily by the larva of P. interpunctella and its adult of more oviposited to the comparatively dark places. We determined the effectiveness of repellent medicine and had compared the different thirteen repellents to P. interpunctella, O. surinamensis and Tribolium castaneum Herbst. Most repellents were useful to P. interpunctella and O. surinamensis but heptyl acetate to O. surinamensis and camphene, n-heptyl alcohol, isoamyl acetate and di-n-butyl Succinate to P. interpunctella indicated the inducement. Acetophenone, camphene and acetate indicated the inducement and put the insect to death. Additionally, the larva of Cryptolestes turcicus (Grouvelle) is described and illustrated first in Japan.
Table 1. Number of Damaged Confections by Insects (According to reports to Department of Public Health, Aichi Prefecture from the Consumer) Fig. 1. Map showing the situation of the Trap in Aichi Prefecture Table 3. Relation of the Injurious Insects and the Damaged Confections (According to reports to Department of Public Health, Aichi Prefecture from the Consumer) Table 2. Seasonal Appearance of the Injurious Insect of Confections by our Observation through the Trap No appearance from Oct. 1968 to May 1969
December 1970 Table 4. Injurious Taken Insect of the Confections by the Trap Table 5. Appearance of Damaged Confections in Different Package Taken by the Trap
Table 6. Invasive Test of two Insects to Different Type of the Package (The Almond Chocolate Used) Table 7. Appearance of Damage by Plodia interpunctella of the Relation between the Material of Package and the Chocolate ( ) numbers mean the total larvae Oct. 1968
December 1970 Fig. 2. Sketch of the Room used for the Observation of Oviposition (numbers mean the situation of trap) Fig. 3. Relation of the illumination and the number of egg in the Oviposition Table 8. Oviposited Place of Plodia interpunctella in the Room and the Illumination (Lux) Illumination of outside (5000Lux), Sept. 1968 Table 9. Repellent Agent and their Chemical Symbol Used for the Effective Observation of Evasion
Table 10. Comparative Result of the Effective Test of Evasion by use of the Olfactmeter First column Oct. 1968 Second column Apr. 1969 Third column Oct. 1970
December 1970 Fig. 4. Olfactmeter
Table 11. Comparative Reseult on the Effective Test of Evasion by the Repellent Agent Added to the Rice Bran in the Share First column Oct. 1968 Second column Apr. 1969 *Dead
December 1970 Table 12. Comparative Result on the Effective Test of Evasion by the Repellent Agent Laminate to the Polycellophane-Package April 1969 Table 13. Comparative Result on the Effective Test of Evasion by the Repellent Agent April 1969 Laminate to the polycellophane-package but a corner of package was cut Fig. 5. Larva of Cryptolestes turcicus (Grouvelle)
Fig. 6. Cryptolestes turcicus (Grouvelle) 2) L.D., Goodhue, C.L. Tissol: J. Econ. Ent. 45, 133 (1952).