ret cal alt a Wades Bee kone if 
i) 
ieee a eet eat Ot ae ware ee URE ok ec 
re 104 ted REPORT: OF SCHIMMEL & © Pe /O OBE ? 
r ag; 2 rane 4 we pk ES s che A Oa yy v2 
lasanee carophila, F. Lw., or of Sehisomaia Pimpinelle ‘may form's ar gall 
the caraway umbels. ERS ee 
_ places over, and to burn the infected plants. The roots . are further attacked bye the e lava 
of Bibto hortulanus, L. ee 
Caraway and fennel may also be attacked by the enemies of other cultivated plants, 
such as mice, the larvze of the cockchafer, 8c. fo ti 
Sabalitschka likewise discusses the fungi and insects which attack roses. ond some _ 
other essential oil plants. As to the former, we beg to refer to a. previous publication’). 
We have not encountered in our rose-fields, so far, the gall gnat Dasyneura_ rosarum, — 
Hardy, mentioned by Sabalitschka. It lays its eggs near the main veins of the rose leaves, 
before these are fully developed. They then do not grow any more but form a sort of | 
pod, inhabited by numerous larve. The gnat is reddish brown, 1.5 mm. long, and has" ‘ 
black stripes across the abdomen. The larve are 2 mm. long, omnes yellom and pupate 
in the earth. q 
Sabalitschka is wrong in saying that Athalia rose is found on roses, for it never | 
attacks them, but ably Lycopus europeus, Scutellaria galericulata, &c.“ The German name 
“Rosenbiirsthornwespe”, by the way; does not belong to it, but to Hylotoma (Arge) rose, L., 
because of the antlers of the males being brushlike. a 
As to beetles, Sabalitschka?) mentions Phyllopertha horticola, L., and Cetonia aurata, Tea 
He states that the larve of the latter live, e.g., in the nests of the red ant. This is a 
mistake, found in old books on insects, it is true, but that is due to a confusion with — 
Potosia (Cetonia) cuprea, F. iS a 
Finally, the author mentions some fungi living on twheintha iblene mignonette, f 
lilac and peppermint. Having discussed the diseases of these plants in the article quoted 
above, we need not go into details again. 
Phyto-physiological Notes. ia 
Fresh knowledge concerning assimilation. — We have hitherto known but little as to "i 
the chemical changes, taking place during the process of assimilation, which is of such ~ 
fundamental importance for the life of the plants. A. Meyer*) has now published a fresh | . | 
contribution. On account of his observations, he supposes that, while the chloroplast — 
prepares hydrocarbons from carbonic acid and water during the process of assimilation, 
a secretion forms in it that separates in the shape of drops. It seems to be identical — 
with all the chloroplasts and he presumes that it is a direct product of the assimilating 
process, the same as the hydrocarbons. One is there led to regard as similar secretions the 
large drops occuring in every mesophyll cell of evergreen leaves, secretions which ha 
formed owing to the assimilative action of the chloroplasts during a long period and whic ; 
have been deposited in the cytoplasma. Such drops have often been seen and investigated. 
These drops can easily be distinguished microchemically from drops of fat. If treated 
with ammoniated potash lye, ae do not become cre as fat drops woh 
1) Comp. Report October 1915, 67.. — %) Deutsche Parf.-Ztg. 4 (1918), 109. — 9) Berichte d. 
Botan. Ges. 35 (1917), 586, 674. As-per a Sieuek copy, kindly sent us. ; shir 
