because of residue hazards, cannot be applied as close to 

 harvest. Parathion will control dipterous leaf miners, 

 cucumber beetles, the melon aphid, and the melonworm. 

 It is of some value against the squash vine borer. 



WHEN TO APPLY 



Pickleworms usually do not appear in appreciable 

 numbers in a cucurbit planting until the earliest flowers 

 open. Examine the terminal buds and blossoms fre- 

 quently. If you find pickleworms, apply an insecticide 

 at once. Repeat the application every 7 days as long as 

 the insect is present, which is usually to the end of the 

 harvest period. 



In areas where experience has shown that the pickle- 

 worm is likely to be present every year on late summer 

 and fall plantings of cucumber, squash, and cantaloup, 

 routine applications of the insecticide should begin each 

 year shortly before the earliest flowers open. 



To obtain satisfactory control of the pickleworm, you 

 must kill the young larvae before they tunnel into the 

 terminal buds, flowers, vines, stalks, and fruits. Early 

 and frequent insecticide applications are necessary. It is 

 especially important that the plants be protected during 

 their fruiting period. 



If possible, apply dusts when the air is calm or the 

 wind velocity is no more than 3 miles an hour, and when 

 the plants are moist. Don't dust when the wind velocity 

 is more than 5 miles an hour. Don't spray when the 

 wind velocity is high enough to prevent thorough cov- 

 erage of the plants. Low-gallonage mist sprays are the 

 ones most likely to be adversely affected by wind. 



EQUIPMENT AND RATES OF APPLICATION 



Apply dusts with ground equipment at the rate of 20 to 

 30 pounds per acre. With aircraft, use 30 to 35 pounds. 

 When spraying, use enough water to give thorough 

 distribution of the insecticide throughout the foliage. 

 The amount of water needed will depend on the equip- 

 ment used. For most cucurbit crops, the approximate 

 amounts of water needed are as follows : 



Gallons of water 

 Equipment per acre 



Low-gallonage ground sprayers — 20 



High-gallonage ground sprayers 75 to 100 



Aircraft sprayers — 4 to 6 



The amount of water applied does not affect the 

 amount of wettable powder or emulsifiable concentrate 

 that should be used; follow the recommendations in the 

 list on the preceding page. 



