[19]

Sea-Kale

(Leaf with Blue, which had been cleaned by F. on July 27' & was found about Sept 15th well covered with bloom & was then recleaned — Gathered on Oct 8th & punctures very carefully counted by Lenny. Not much difference in decay between 2 sides.

Left side 371. Right & cleaned side 618 on upper surface alone.)

(Leaf with bloom which had been cleaned by F. on July 27 & upper surface recleaned on Sept 11' gathered Oct. 10th Punctures counted by Lenny on left side 674; on right or cleaned 402!

This first hostile case. N.B a portion of left side had been cleaned accidentally. —

Large Portions of left side were much freer of punctures than any on the right side.)

No difference in decay of 2 sides.)

[20]

Sea-Kale 1877

Sept. 16th. I observed a multitude of dark Halticæ on the Sea-kale & cabbage-leaves, these no doubt cause of punctures.

(― 16 counted punctures on a leaf with blue White-mark no marked difference in withering of either side & both rather fresh. —

On left side with bloom 202 punctures & holes: on right & cleaned side 863 do. — carefully counted.)

(Sept 27th leaf marked blue — the 2 oth sides about equally & slightly decayed.

On left side 460 punctures — on right cleaned side 924.)

(Oct 1. Leaf mark with white tape — right & cleaned side more decayed. — Left side with 639 punctures & holes — Right & cleaned side with 908 do.)

(Oct 5' a leaf marked Blue, which had been cleaned both surface on July 27th was found on Sept 11th so well covered with bloom, both upper & lower surfaces, that I at first thought mistake, but not so. On Sept 11' the upper surface was again sponged & the leaf had been remarkably little attacked with no perceptible difference between the 2 sides. This leaf was gathered Oct 5 (ie 24 days after having been recleaned) & now there was wonderful difference in the punctures on the 2 sides. No difference in decay or withering of the 2 sides. Left side with bloom 478 punctures: right & cleaned side 1690 punctures & holes.

[21]

Sea-Kale 1877

Sept 11th

Two of the leaves which had been cleaned had so much bloom on upper surface that looked as if never had been cleaned; Lettington cleaned this morning only the upper surfaces of both; added black wool to the Blue braid

If I have any other evidence of reappearance of bloom, this is a first rate case, but odd how very unequally the leaves renew bloom. These 2 leaves now recleaned have extremely few punctures on right side. —

Sept 16 I observe much bloom renewed on some other leaves. —

[22]

Sea-Kale

July 9th 77

8˚. 30' A. m F cleaned with sponge & water at 80° F both surfaces of right side of youngish leaves 4 of them

July 27th 11˚ F. cleaned both surfaces of right side of 5 leaves — marked stick with Blue

(Aug 27. gathered a leaf (I forgot to mark whether one of the Blue one of the white wool former paper)

Right & cleaned side y rather yellower with immensity brown specks & parts quite decayed, whilst the left side still perfectly fresh. — contrast wonderfully great. —

On right side 365 punctures & holes — on left side 167.)

(Sept 4th gathered another white wool leaf right & cleaned side rather yellower than left with 327 punctures & holes left side 241.)

(Sept. 10, gathered large leaf, Blue mark right or cleaned side rather more decayed: I thought that bites were equal on 2 sides & this shows how little can be told without counting (a). It is instantly a curious fact how largely these Cruciferæ are attacked by insects, no wonder some protection.

The gnawed points were counted only on upper surface & not quite so carefully as before; yet leaf cut into narrow strips — Holes counted only on upper surface & leaf viewed as opake object.

Left side 386: right or cleaned side 648.)

[22v]

(a) we may hence infer that the first leaves in which the holes were not counted, these in the right must have greatly preponderated.