294 THE MONTHLY BULLETIN. 



The Red Spider on Hops. 



The red spider is a general feeder on many of our field crops, and 

 often does serious damage to the hop vines. This mite is very small, 

 reddish or greenish-yellow in color, and feeds principally on the under- 

 sides of the leaves, covering them with a fine web. The leaves infested 

 with the mites develop yellowish spots, later turning yellow and falling. 

 The sprays recommended by W. B. Parker of the U. S. Bureau of Ento- 

 mology, consist of flour paste, 8 gallons to 100 gallons of water, or 

 lime-sulphur (33 deg. Baume) 1 to 100 of water, with flour paste 4 

 pounds to 100 gallons. The flour paste is made by using a cheap grade 

 of wheat flour with cold water, making a thin batter. Use 1 pound of 

 flour to 1 gallon of Avater, cook until a paste forms; use in the above 

 proportions. Agitation is essential. 



Grasshoppers, 



An excellent formula for a poisoned bran mash to be used against 

 the grasshoppers consists of bran 50 pounds, Paris green 3 pounds, 

 lemons 10 fruits, syrup 3 quarts, water 5 gallons. The method of 

 preparation as recommended by Geo. A. Dean, Entomologist of the 

 Kansas Experiment Station, is as follows : 



"Mix the bran and Paris green thoroughly in a wash tub while dry. Squeeze 

 the juice of the lemons into the water and chop the remaining pulp and the peel to 

 fine bits and add them to the water. Dissolve the syrup in the water and wet the 

 bran and pour in with the mixture, stirring at the same time, so as to dampen the 

 mash thoroughly." 



This mixture should be scattered about Avhile moist where the grass- 

 hoppers occur. Mr. George P. "Weldon while on a recent trip in Ven- 

 tura County to investigate grasshopper injury near Oxnard had an 

 opportunity to note results with the formula, and reports it to be a 

 decided success. 



The Oak Moth. 



To destroy the larvae of the second brood of the oak moth use arsenate 

 of lead, 5 pounds to 100 gallons of water. The larvas of the oak moth 

 destroy the leaves. In spraying the foliage of large oak trees a strong 

 pressure- and tower will be necessary. 



PLANT DISEASES. 



A Disease of Tomatoes. 



At this season of the year many tomato vines fail to set fruit. The 

 vines blossom well and appear thrifty. However, the blossoms after 

 hanging on the vines for a short time fall off. leaving part of the 

 peduncles attached to the stem. One cau^e of this trouble is a fungus 

 which causes late blight of the potato and the fruit spot of the tomato. 

 Several growers have been rewarded by a good crop of fruit after 

 having sprayed with atomic sulphur, 10 pounds to 100 gallons of water. 

 Bordeaux mixture has also been advised by Mr. H. S. Fawcett of the 

 California Experiment Station in an experimental way. 



