Insects, etc., Injurious to lite Gooseberry. 



281 



their increase, tlioir equally sudden disappearance, even in warm 

 weather, are subjects ahout whicli much further investigation is 

 necessary. 



Pi;i';VENTT()X AND TlUi.VTJIElNT. 



The recognised treatment fur tlie lied Spiders has l)eeu some form 



of sulplurr wash. Liver of sulphur has proved tlie most convenient 



form. It has, liowever, been found of no 



avail in certain years. For instance, in 1907, 



little good was done liy spraying with this 



acaricide. The other aearicide found to work 



Avhen sulphur fails is paratlin emulsion, and 



the best results liave been oljtained with 



paraffin jelly. ( 'onsiderable success has also 



attended the use of nicotine washes, which 



I found by far the most successfTil of all in 



1907. 



The question of preventing the attack 



is one vdiich growers naturally are most 



concerned with. 



ATe know that the immature acari 

 shelter i n t h e 

 crevices, etc., of 

 tlie wood in Feb- 

 ruary and March, fi.!, l!l:i.-(;n(iyEIil'.l;l;V KEI' ^I-IMIU 



and at this time , ■?;'"",''■ i^ 



a heavy spraying 



would be sure to Icill very many, ^Ir. John 

 Riley of Putley Court, Ledbury, wrote rne 

 in 1902 that he had found great lieuefit from 

 spraving with caustic alkali wash, and it is 

 quite possilde that this treatment in late 

 winter kills the young acari. 



Washing, in any case, in late February 

 earniot fail to kill large numbers, and then 

 fairly strong paraffiu emulsion may fie used ; 

 up to as mud I as five gallons of paraffin to 

 100 gallons of Avash has lieen found to do 

 no harm. 



AVhere attack only makes itself notice- 

 able in Jpril or May then Ave must spray vith either the Iner of 

 sulpliur or the paratlin jelly, and it mny be pointed out that to be ot 



FTi:. IriM, — K.lll'TY i:i:i;-MIKI,I 



i;k]) si'iiiKj;. 

 (Creatly ciilargtil. ) 



