UN I TED. STATES DEPARTMENT OF AGRI CULTURE Bureau of Entomology and Plant Quarantine Washington, D. C.
3. E. P. Q .--359 (Supplement No. 2) October 15, 1937.
SUPLEMENT NO. 2 TO
INSTRUCTIONS TO INSPECTORS ON THE TREATIvMENT OF NURSERY PRODUCTS,
FRUITS, VEGETABLES,-AND SOIL, FOR THE JAPANESE BEETLE,
PURSUANT TO NOTICE OF QUARANTINE NO. 48
Section II of Circular BP.Q.--359 entitleds"Instructions to Inspectors on the Treatment of Nursery Products, Fruits, Vegetables, and Soil, for the Japanese Beetle",. .s further supplemented as follows:
.11.. TREATMET OF.SOIL ABOUT THE ROOTS OF PLANTS F. PARADICHLOROBENZEINE TREATMENT
The following instructions, based on the horizontal diffusion of gaseous paradichlorobenzene, d.o not supplant the instructions given in Supplement No. 1 to B.P,Q,--359, issud August 23, 1935, but-.modify them in such a manner that the treatment can be applied more safely to the smaller sizes of nursery plants.
Material.--Paradichlorobenzene. A technical grade or C. P. grade, ground into small-sized crystals, is satisfactory for this treatment.
Condition of pluging soil.--Paradichlorobenzene should be mixed with a light soil, which should be moist,. friable, and relatively low in organic matter. It should be sifted through a half-inch mesh screen to remove large lumps, stones, and debris prior to mixing with paradichlorobenzene.
Sondition of plant ball.--The. plant balls should be moist,. but not wet, and not over 6 inches in diameter. If the soil is wet the treatment will not be satisfactory; if the soil is dry the plants may be injured during the treatment.
Season.--Treatment can be made at any time between October 1 and May 1, providing the proper temperature conditions can be obtained.
Temperature .osae- anrd exposure requiremen s.--The various
combinations of temperature, dosage and exposure which are effective in destroying the larvae in plant balls of different diameters are given in Thble 5. The temperatures given at the head of the different columns in Table 5 are considered to be the minimum temperature during the treatment.
Application of the treatment.--The treating-soil should be mixed immediately before being used, as follows: Spread the soil in a thin layer on a siaodth surface of a floor, bench, or other suitable space, scatter the crystals uniformly over the surface of the soil, and mix thoroughly by means of a shovel, rake, hoe, or fork, turning the mass at least three times during the operation. It is necessary to remove the pots from potted plants before placing them in the treated soil. When the burlap on balled plants is of acoarse weave which will not inhibit the proper penetration of the gas, it may be left on the balls, but when the material is closely woven it should be removed. When the plants are red.dy for treatment, a layer of the treated soil is spread on a smooth hard surface such as a floor or bench. Then, &Aro.w...of plants is placed on this soil with the balls spaced at least 1 inch apart. Then the spaces between the plant balls are filled with treated soil, taking care.r4ot to get it on top of.the balls or in contact .with the stems. Finally, about 1 inch of treated toil is placed firmly against the row of treated plants. The operation is repeated until all of the plants are in place. When completed,-' each plant ball is surrounded on the sides ad bottom by at least 1 inch of treated soil.
Care of plants during treatment.--The plants should not be removed from the treated soil during the period- of the treatment.. If it is necessary to apply water to the plants during-the treatnent to prevent desiccation, the operation should be limited to a light syringing, under the supervision of an inspector. If sufficient water is applied to make the treated soil or the plant balls middy, the insecticidal action of the gas may be seriously empire d.
Care of plants after treatment.--The insecticidal action of the gas is completed at. the end of the period of treatment. It is advisable to avoid excessive watering of the plants after removing them from the treated soil in order to permit any residual gas to escape from the plant balls. Saturating the balls with water tends to prevent the escape of this residual gas and may cause some injury to the plants. It is possible to handle the plants after treatment by the usual nursery procedure, providing care io taken to avoid reinfestation.
Table 5.--.osage, temperature, and exposure requirements for
paradichlorobenzbne to, destroy larvae of the Jp8nese beetle by horizontal diffusion of the gas
through plant balls of different widths.
Diameter Pounds of
of the crystals
plant per cubic Days of treatment required when the minimum
balls yard of temperature in F is within the range
in plunging indicated below
inches soil 45-49 50-54 55-59 .60-64 65-69 70-74
Up to 2 I --. 10 9 7 5
5 9 7 6 5 4 2
o10 7 6 5 4 3 2
20 5 5 4 3 2 1
2_4 1 -- -- - -- 10 6
5 -- 10 10 9. S 4
10 9 S 8 7 6 3
20 7 7 6 6 5 2
4 6 1 -- -- -- -- -- -10 -- -- -- 9 7
20 -- -- g 7 6 4
Blank spaces indicate that the exposure is more than 10 days.
UNIVERSITY OF FLORIDA
3 1262 09245 1342
ts.--In addition to the varieties of azaleas-Varieties Of P_ antA-zalea hinodigiri, A. anoena,, obtusca"kiusiana v,).r. Coral Bells, kaeM, f!jtj varsil, QlQopatr,-i,,,Fedore,, Othello, and Salmon Boauty--for which the treatment wr.is 'orig in6:11, i,,,.recomnende d-'.,,th.e preliminary exper'mants in. dictate that the following ht bo'treated satis.
factorily by this *robed-dre.i.'
Anemone h hensis
Acquilegia sps var. Mrs. Scott Elliottls-hybTid'
As ter 'alpin-i 6,
Cam'panuld. M diw
--Cer,-n-t osi, igt 1, Dlun. b ao,- noides
Dianthus. caryophyLlus var. Abbotsford Pink
gitalis -purpurea.Lj zftt o r iu:a coelestinura
Holianthen.11m glauclin croceu.
Iberis anra Mvosotis sp.
"Phlox sp. var. R. ,P-. Struthers
Santolina chamaecuarissu's inc,-aia
Viola sp. var. Jersey Gem,
Viola sp. var. Ro s ina
The treatmentt of 'the f ollcw i-ig, "ir rieties* of potted -plnmts by this ct 0
procedure is still somewh t doubtful,
Do hinium grnndiflorw chinense
Fraea:,ria sp. vars. Bun Special, Dorse, Fairfnx, and Joe
Limoniun. latif oliu,
Ir TTM A C! MD MT