“i10— 
Hessian fly parasite Polygnotus pleuron Wlk.--C. C. Hill, Carlisle, 
Pae, reports that “out of 6 hessian fly puparia containing P. pleuron re~ 
ceived fron France we have reared to date 46 adults, about two thirds of 
which were females. Most of these emerged after the oviposition period of 
the fly was over, which made futile any serious attempts to introduce them 
into the field this year. Efforts have been made, however, to breed this 
parasite in’ laboratory cages, and in this connection a good many hosts have 
been successfully parasitized and are now in the process of being reared, 
P. pleuron oviposits into the egg of the hessian fly. Its manner of ovi- 
position is essentially tle same as that of Platygaster herrickii Peck. and 
very similar to that of P. zosine Wilke Its potential progenitiveness is 
high, examination of a female 4 days old showing the presence of from 650 
to 700 developed ovules. This is much higher than that of the host, which 
averages only 240 eggs per femle in the spring generatione One P. pleuron 
Was observed to oviposit into 248 host eggs in the course of 12 dayse 
Males were observed to mate and females to oviposit on the same day they 
_ emerged," 
Hessian fly resistance in wheat may be modified by differences in soil 
fertility and moisture.--E, T. Jones, Wichita, Kans., reports that superfi-. 
cial observation of recent flat-tested wheats indicate that, while a predispoe» 
_ sition to fly resistance is inherited in some varieties of wheat, this resist~ 
ance is largely physiological in character and my be modified by soil fertili- 
ty and moisture. This conclusion was reached from an examination 4A May of 
50 plants from each of 60 10-inch flats in which the soil was treated with 
various essential elements. ; 

Large acredges of California land infested with . ers in Maye-~ 
‘According to C. Ce Wilson: "By the end of May 350,000 acres of range and cules — 
tivated land were estimated to be infested with grasshoppers in 17 ¢ounties 
of the State. The, most striking activity end damage to cultivated crops were 
in the coastal counties where adult migration started from the hillsearly in 
May on account of the drying up of the usual food plants. The Sacramento 
Valley is very lightly infested and has a delayed hatching of the grasshopper 
eggs in alfalfa fields. In the foothills only a few grasshoppers have been 
observed, The following species of eérasshoppers are involved in the infested 
territory: Melanoplus mexicanus Sausse, Camnula pellucida Seud., Oedaleonotus 
Rr nar tones 
enigma Scud., Hippiscus californicus Scude, Melanoplus marginatus Scude, and 
Me femur-rubrum DeG,." 
Grasshopper control in Oregone--On April 23, bait materials to the ex» 
tent of 250 tons, dry=bran basis, were allotted to Oregone These materials 
were distributed to 6 counties by May 23, all but the most inaccessible of the 
counties (Grant) being supplied with the major portion of their allotments by 
May 8. On May 2, 50 tons additional were authorized for Tule Lake, in Siski~ 
you and Modoc Counties, Calif., to be used under the direction of Ce. Ae Hender-~ 
son, County Leader of Klamath County, Oreg. Materials for Tule Lake were 
supplied by May 8, On May 16, 50 tons additional were allotted to Harney 
County, Oreg., which was late in organizing, as there was no county agente 
Harney County was Supplied with its complete allotment by May 26. The 

