TURNIP GALL WEEVIL. Ill 



attack is gas-lime, which is also good as a preventive 

 of the Gall Weevil attack. 



Dressings of lime are very serviceable to prevent 

 these kinds of attack, both in Cabbage and Turnip. 

 Gas-lime and wood-ashes are also good preventives, 

 and probably kainite, which contains much potash, 

 ■and which is not nearly as much used as it ought to 

 be, would be very useful. Marl or fresh soil is useful 

 in old garden ground, and deep trenching, which 

 throws fresh soil to the top, and buries the Weevil 

 maggots so deeply that the Weevils from them have 

 not strength to come up through the soil above them, 

 is also a good treatment. 



Before going on, it may be well to notice that these 

 notes of method of attack are not offered as complete 

 accounts of the history and method of prevention of 

 any of the attacks, but as instances of special points 

 to be looked to — of habits, that is — that many crop 

 pests have in common, and of means of treatment, of 

 which some one or other may be serviceable for the 

 ■attacks of many insects. 



In many of the Weevil attacks which we have been 

 studying, treatment of the surface of the ground is a 

 great point ; as, for instance, where they shelter 

 under rubbish, or down stubble, to clear away these 

 shelters, and put on dressings which will be thoroughly 

 obnoxious to the Weevils, is good treatment. Where 

 the Weevils, or their grubs, are in the ground, it 

 obviously is well to turn them out on the surface, or 

 bury them by trenching so deeply that they cannot 

 come up ; and also, so to dig in, or otherwise apply, 

 €hemical manures, as to make the soil unpleasant at 

 least to the pest, and so good for the plant that it 

 may grow away from attack. 



the subject will be found in 'Diseases of Field and Garden Crops,' by 

 Worthington G. Smith, pp. 94 — 104, published in 1884. Various 

 conditions of land or chemical manures were known to affect amount 

 of " club," but, as far as I am aware, it was not known that these 

 acted not so much by immediate effect on the plant as by destruction 

 ■of the slime-fungus. — Ed. 



