Ll. Lloyd 101 



comes a prisoner there. In a normal year there are two complete genera- 

 tions and a partial third, and the moths are present in the houses con- 

 tinuously from February to October. 



Spraying the young plants with arsenate of lead largely controls the 

 first brood of larvae, but not entirely, because moths of the first flight 

 of the year are still emerging when it is not practicable to use a poisonous 

 spray on the plants. The plants should be sprayed three times when 

 the larvae appear early: (1) when the seedlings are in pots; (2) just after 

 planting out; (3) about a month before fruit picking begins. The last 

 operation is the most important and the two previous ones may be 

 omitted if there are no signs of larvae feeding. 



Systematic moth trapping must be done throughout the growing 

 season, because it will reduce the numbers of moths which pass out of 

 the houses, and these, or their offspring blunder into the same or neigh- 

 bouring greenhouses; and also because it is the most effective form of 

 control when spraying is not practicable, and will reduce the infestation 

 to a very great extent. Sixty jars baited with ale, treacle and 1 per cent, 

 sodium fluoride should be used to each acre of glass. The dead moths 

 should be removed frequently, and the jars should be rebaited every 

 third week. 



Broken fruit must not be allowed to lie about in the houses as the 

 moths feed on this and become more prolific. 



Many full grown larvae may be trapped in sacks placed about the 

 houses. The sacks should be collected and dipped in boiling water every 

 third week. 



Pupae should be destroyed in the winter. 



Special baskets should be kept for fruit picking, and those from the 

 markets should never be allowed in the houses. 



The pest spreads rapidly through areas where the nurseries are con- 

 gested owing to the escape of moths from the infested houses. It may 

 be introduced into isolated localities by means of market baskets, or by 

 plants purchased from infested nurseries. On its first appearance every 

 method of control should be applied at once, as attempts to check it by 

 picking off the larvae by hand in trade nurseries have almost invariably 

 ended in failure. 



