TURNIP WEEVIL. 
95 
throughout the country being almost entirely destroyed, and on the 
observer’s own farm a field of twenty acres was badly injured. It is 
noted that whilst fields sown about the same date—that is, the 25tli 
June—suffered severely, that others sown earlier or later escaped 
entirely. This is considered to point to weather influence, more 
especially as it was observed that a few days after the Swedes were 
sown there was a week of intense heat, which would at once be 
favourable to the insects, and keep the tender braird back under 
their power. 
In the case of a field of Yellows attacked it was thought best to 
allow the crop to remain, as the season was too far advanced to re-sow 
with any chance of success. In a short time it came into rough leaf, 
yet still the insects went eating off nearly as much daily as the growth 
made, so that the crop remained stationary during a period of eight 
days. Moist warm weather then brought the crop on, but for a long 
period they did not assume a healthy appearance, and at the date of 
writing, late in the autumn, the state of the crop was disappointing. 
In the very careful account given by Mr. Greo. Brown of the attack 
of this Weevil in 1881 (see Beport, pp. 102—105) it is noted that 
benefit occurred from dusting the attacked plants with quicklime, 
also that the amount of Weevil presence was less where gas-lime had 
been used as a dressing in the previous autumn, and more where the 
land had been foul with charlock. 
* The figure here given of the Turnip Gall Weevil, the Geutorhychus sulcicollis, 
gives a fair idea of the above-mentioned kind. 
1—5, Gall with maggots nat. size and magnified; 6 and 7, Weevil, nat. size and 
magnified ; 8, leg of Weevil, magnified. 
