. Commercial mass culture of the California red scale parasite : Aphytis lignanensis. Citrus; Scale insects. Fig. 7. Placing honey streaks in parasite oviposition-collection unit. average of 10 per cent while maintaining constant peak production. The average surface area of the squash in the drawer must next be estimated. Since surplus squash usually are avail- able, squash should be chosen to obtain the largest size that will permit 6 squash per compartment of the parasite oviposi- tion-collection unit. The minimum size should be 14 x 5 inches, the maximum no greater than 22 x 7 inches. We ha
. Commercial mass culture of the California red scale parasite : Aphytis lignanensis. Citrus; Scale insects. Fig. 7. Placing honey streaks in parasite oviposition-collection unit. average of 10 per cent while maintaining constant peak production. The average surface area of the squash in the drawer must next be estimated. Since surplus squash usually are avail- able, squash should be chosen to obtain the largest size that will permit 6 squash per compartment of the parasite oviposi- tion-collection unit. The minimum size should be 14 x 5 inches, the maximum no greater than 22 x 7 inches. We have used squash averaging about 1,300 square centimeters (18 x 6 inches). Table 7 Recommended female-parasite-in- oculum and host-density combina- tions and approximate expected parasite progency production Per square centimeter of squash surface Fig. 8—Appearance of various scale densi- ties expressed as number of scale per square cm of squash surface. Estimated number of host scales per sq. cm Recommended female parasite inoculum per sq. cm Expected female progeny per sq. cm 35 45 55 65 20 25 30 35 [31. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original DeBach, Paul; White, Ernest B. Berkeley, Calif. : Division of Agricultural Sciences, University of California, California Agricultural Experiment Station
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