168 THE MONTHLY BULLETIN. 



INSECT NOTES. 



The peach twig- borer, Anarsia lineatella, was taken in hibernaculEe, fi'om crotches 

 of almond trees at Paso Robles, on January 21st. — Geo. P. Weldon. 



Reports of termite injury to prune, peacli and almond trees, from Riverside County, 

 led to an inspection of affected trees in tlie vicinity of Banning. In all cases that were 

 observed the insects were burrowing into dead wood, and it could not be determined 

 that they were responsible for its death. On the other hand it was concluded that their 

 injury was largely if not wholly secondary. The infested trees practically all had 

 crown gall and the termites had gained entrance through these galls into portions of 

 the trunks where decay had set in and where there was dead wood for them to work 

 upon. While there may be cases of damage to good wood as well, observations in this 

 orchard indicated that they were working entirely in dead wood. — Geo. P. Weldon. 



The eggs of the brown or almond mite, Bryobia pratensis, were found abundantly on 

 almond trees in the Banning section of Riverside County, indicating that this species 

 of mite is very common there. — Geo. P. Weldon. 



A few egg masses of the fruit tree leafroiler, Archips argyrosijila, were found on the 

 bark of apple trees in the Yucaipa section of San Bernardino County on February 3d. 

 They were not abundant enough to cause any worry at the present time. — Geo. P. 

 Weldon. 



Quite a severe infestation of Sanninoidea opalescens, the peach borer, was found 

 recently by County Horticultural Commissioner Sharp in Riverside County. This is 

 the first report of its occurrence in the county.— Geo. P. Weldon. 



Immature specimens of the Monterey pine scale Physokermes insignicola (Craw.), 

 have recently been sent in from Burlingame. This species is usually kept well under 

 control by its predaceous and parasitic enemies, of which there are many. — Lerot 

 Childs. 



The orange tortrix, Tortrix citrana, was found to be doing considerable damage in 

 parts of Orange County visited on February 4th and 5th. — Geo P. Weldon. [Later 

 reports of serious injury at Pasadena have been received. — A. J. Cook.^ 



The black scale, Saissetia olew, while not considered to be a pest of the walnut, it is 

 interesting to note that it does live upon trees of the English variety. Several groves 

 in Santa Ana County were recently found to be infested to a slight extent. — Geo. P. 

 Weldon. 



The seriousness of Heterodera radicicola, the potato eelworm, under favorable con- 

 ditions in the nursery, may be judged from a recent bad infestation observed in Kings 

 County. About 75,000 peach trees out of a total of 100,000 had to be destroyed because 

 of an abundance of galls on the roots. The trees were grown on light, sandy soil which 

 probably favored the increase of the pest. — Geo. P. Weldon. 



The black scale, Saissetia olew, (Bern.), has been found to occur in conspicuous 

 numbers on olive trees at Marysville. Adjoining grapefruit trees show a slight infesta- 

 tion while none could be found on orange stock. This same extraordinary condition is 

 found in the interior citrus growing sections of the south in and about Redlands. — 

 Lerot Childs. 



