486 



with a solution of 2 per cent, tobacco extract and 0"2 per cent, soft 

 potash soap, and this spray was apphed again on 31st July. Care 

 was taken to operate under conditions obtaining in normal practice. 

 At the end of August there was a reduction in the number of larvae 

 varying from 71 to 85 per cent., corresponding to a reduction in the 

 number of damaged grape berries varying from 52 to 84 per cent. An 

 experiment was made with a single treatment on 31st July with 

 copper-sulphur containing 5 per cent, of powdered lead arsenate. 

 This showed a reduction of 40 per cent, in the number of the larvae 

 and 21 per cent, in that of damaged berries, but the advisability of 

 such arsenical treatment in mid-summer is questionable. While the 

 results of the combined winter-spring-summer treatment are not 

 negligible, they are uncertain and do not therefore solve the problem 

 of vine moth control entirely. 



Rastello (F.). II Grillotalpa. [The Mole-Cricket.]— i2u\ Agric, 

 Parma, xxiii, no. 35, 31st August 1917, pp. 464-465. 



This is a popular article on the mole-cricket {Gryllotalpa gryUotaJpa\ 

 and its destruction by the usual methods. In Crete gardeners collect 

 plants of EupJwrbia cyparissias, crush them and express the juice, 

 which is mixed with water in a 2-4% solution. After an hour's time 

 this liquid is used for watering the ground in which the seeds of melons^ 

 cucumbers, etc., are to be planted. If planting has been done early 

 and germination has already taken place, the watering is done round 

 the stem only over a radius of 4-8 inches. 



Un nuovo Rimedio contro la Filossera? [A new Remedy against 

 Phylloxera.']— Riv . Viiic. Enol. Agrar., Conegliano, xxiii, no. 17, 

 1st September 1917, pp. 290-291. 



This article is an abstract of a report by Berlese and Del Guercio 

 to the Italian Ministry of Agriculture on a remedy against Phylloxera 

 discovered by Signor Guido Manetti. The apparatus consists of a 

 glass tube, which is joined by rubber tubing to a short lead tube. 

 The glass, which is filled with a certain liquid, is fastened vertically 

 to the stock and the lead tube is screwed into a perforation made in 

 the stock about 12 or 16 inches from the ground. The apparatus, 

 which lasts for years and may be used on several stocks in the course 

 of a year, costs about 2d. and the liquid also is cheap. On the 

 22nd August 1916, ten strongly infested European stocks were thus 

 equipped and the same liquid was used for two further stocks fitted 

 with an arrangement designed by Berlese some years ago. At the 

 end of a month the foliage and grapes of seven of the vines were 

 withered while those of the others resembled those of the control 

 vines. This injury was ascribed to an excess of liquid (about 3| oz. 

 per stock) or to an incorrect proportion of the three component 

 ingredients. The woody parts were not affected. Examination of 

 the roots showed that the surrounding soil was impregnated with 

 special effluvia and that the roots were almost free from the insects ; 

 the few remaining specimens were discoloured and died in the 

 laboratory. The infestation on the roots of the untreated vines was 

 very severe. The experiments could not be pursued further for the 

 time beins. 



