83 
The pear-tree psylla, Psylla pyricola Forst., is doing considerable 
injury to some pear orchards in Kent County. Many trees were 
practically killed last season in the same orchards by this pest. No 
satisfactory remedy yet found. 
The plum curculio, Conotrachelus nenuphar Ubst., while present in 
all parts of the State in both peach and pluim-orchards, is not doing 
serious injury. [The so-called June drop in Maryland peach belts 
was comparatively hight this season. | 
The rose-chafer, J/acrodactylus subspinosus Fab., has been reported 
in one or two cases as Injuring grapes on the Eastern Shore. It has 
not been abundant since the 1899 freeze. 
The San Jose seale, Aspidiotus perniciosus Comst., has occupied a 
great deal of our attention. It is still the most serious orchard pest 
we have to contend with. Many new localities have been discovered 
by our inspections. We have found 20 to 25 per cent kerosene and 
water on peach just before the buds open very effective. We do not 
advise this strength for fall and winter on the peach. As a spring 
spray it has been very satisfactory in our mountain peach belt. After 
the fruit is gathered we will use a 10 per cent kerosene spray on infested 
trees. [The writer saw large blocks of peach in Georgia in July that 
had been sprayed with 10 per cent kerosene and water just after the 
fruit was removed. The scale was in most instances killed, with little 
or no injury to the foliage. In all cases some leaves were injured, but 
not enough to cause serious damage. On the other hand, however, 
where a 10 per cent crude petroleum and water solution was used 
the foliage was badly hurt and falling at the time of our visit, July 
14]. As previously stated in former publications, the writer advises 
growers to use kerosene, even in diluted form, with every caution. 
It is a dangerous substance. 
The stalk worm of tobacco, Crambus caliginosellus Clem., known 
a:so as the sooty corn-root webworm, has been conspicuous in young 
tobacco, especially upon grass or sod lands. No satisfactory remedy 
has been found as yet. Planters should avoid setting tobacco on sod 
land. 
The striped blister beetle, Apzcauta vittata Fab., as usual, has been 
quite a serious pest in tomato and potato fields. In one instance it 
destroyed a field of beets. 
The striped cucumber beetle, Diabrotica vittata Fab., has been quite 
common in cantaloupe fields. No satisfactory remedy found. 
The white-marked tussock moth, Orgyia leucostigma S. & A., as 
last year, has appeared in considerable numbers upon shade trees in 
Baltimore. 
GENERAL NOTES. 
In addition to the above, the potato-stalk weevil, Zrichobaris trino- 
tata, has been quite prevalent in the State in potatoes. 
Pemphigus acerifolii Riley, reported by me as doing injury to 
maples at the Agricultural College in 1898 and 1899, has been quite 
