cover image: The Indian Forest Records. (Report on Lac and Shellac)

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The Indian Forest Records. (Report on Lac and Shellac)

1921

The allusion * is to the vast numbers of minute lac insects which emerge at the period of swarming and settle on the young shoots of the " host "-tree to suck its juice and exude the lac of commerce. [...] Having safely emerged from the lac the males crawl or (if winged) fly about and proceed to fertilize the females that they find the long copulatory organ of the male reaching the female through the anal aperture in the lac. [...] The honey-dew is excreed the lac-dye accumulated in the body and in the eggs while the various components of " lac " are apparently elaborated in special secretory glands and exude like sweat from various parts of the body the yield being specially abundant from the female during the period of gestation. [...] With a view to further consideration and enquiry it is here suggested that the periocf of intense lac production imediately following the impregnation of the female lac insect coicides with or is in some way dependent on the corresponding period of vegetative activity of the host ; and that the reason why the winter brood takes so long to mature and why a comparatively small amount of lac i [...] Should this theory be found correct it will provide a simple explantion of the fact that in the autumn brood the male undergoes his metamorphosis in about one month while in the spring brood he takes 3i months ; on the assumptions firstly that he is waiting for the period of vegetative activity on the part of the host so that the abundant supply of food required by the female during the first
agriculture environment
Pages
186
Published in
India
SARF Document ID
sarf.120236
Segment Pages Author Actions
Frontmatter
i-x H. A. F. Lindsay, C. M. Harlow view
Chapter I. The Lac Insect
1-12 H. A. F. Lindsay, C. M. Harlow view
Chapter II. The Host-Trees of the Lac Insect
13-21 H. A. F. Lindsay, C. M. Harlow view
Chapter III. Distribution
22-25 H. A. F. Lindsay, C. M. Harlow view
Chapter IV. Cultivation
26-33 H. A. F. Lindsay, C. M. Harlow view
Chapter V. Suggestions for Improved Methods of Cultivation
34-43 H. A. F. Lindsay, C. M. Harlow view
Chapter VI. Collection and Storage
44-48 H. A. F. Lindsay, C. M. Harlow view
Chapter VII. Lac Rents and Leases
49-56 H. A. F. Lindsay, C. M. Harlow view
Chapter VIII. Manufacture.—Part I
57-68 H. A. F. Lindsay, C. M. Harlow view
Chapter IX. Manufacture.—Part II
69-77 H. A. F. Lindsay, C. M. Harlow view
Chapter X. Internal Trade of India
78-87 H. A. F. Lindsay, C. M. Harlow view
Chapter XI. Foreign Trade
88-95 H. A. F. Lindsay, C. M. Harlow view
Chapter XII. Summary of Recommendations
96-97 H. A. F. Lindsay, C. M. Harlow view
Appendices
98-162 H. A. F. Lindsay, C. M. Harlow view
Backmatter
i-x H. A. F. Lindsay, C. M. Harlow view

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