Reports to various Correspondents. 51 



the wash more firmly fixed to the fruitlets aud foliage. This can 

 be used at ten times the strengtii given on p. 28 of the previous 

 report. 



Scorching of Foliage and non-success of Paris Green. 



Messrs. Ellis & Son wrote during June as follows : — " We spray 

 annually as soon as the buds begin to open with Paris green 

 (Blundell's), 1 oz. to 20 gallons of Avater. The first spraying may do 

 a little good, but once the caterpillar has grown a little it is abso- 

 lutely ineffectual, and this year, although we have already sprayed 

 three times and one piece four times, the caterpillar has completely 

 wrecked many pieces of trees (apples), eating away the hearts of the 

 buds, and the trees are simply bare poles. The different sorts seem 

 to be differently affected, fine foliage sorts looking just like dead 

 trees, whilst stronger growing kinds are fairly green. Although we 

 always add a little lime, we think that we always scorch the foliage 

 if we use stronger wash on the apples. I enclose you sample of foliage 

 which has just gone brown ; do you consider this the result of spraying ? 

 The strength of the wash was not greater than 1 oz. in 20 gallons. 

 In our hands, I believe, after many years' use, Paris green has been 

 a complete failure in any effect it has had on Winter Moth cater- 

 pillar. Of course if the brown spots which generally follow the 

 spraying are not due to the Paris green in any way, we might 

 probably use a stronger mixture which might prove effectual." 



The foliage sent certainly looked as if it had been scorched with 

 Paris green, the brown patches at the ei:]ges of the leaves being 

 very characteristic scorching from this arsenite. Now and then this 

 will occur from (1) the wash not being properly mixed ; (2) being 

 put on too heavily ; or (3) a bright sun on the sprayed leaves. 



Damage is, however, very seldom reported. I have myself often 

 found Paris green of little use. Several growers who have derived 

 great benefit from spraying with it have found this year it did little 

 good, owing to frequent and heavy rains washing the arsenic off. 

 Such conditions we cannot control, we must either let the larvse go 

 on or wash again as soon as the weather clears up. With frequent 

 heavy rains no wash will do any good — hence so often failures in this 

 country. 



You can use Paris green up to 1 lb. to 100 gallons — more is not 

 necessary and is sure to burn the leafage — unless the arsenite is very 

 old and has lost its properties. But 1 in 200 is really ample, and I 

 should never advise more. 



Arsenate of Lead. — This is much more effectual tlian Paris green 



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