pay fp 
In the laboratory, eggs have hatched as late as 15 days after they were 
taken from the field, and the avergge incubation period at this time of the 
year apparently is more than 2 weeks. An egg laid in the laboratory on May 
e4 had not hatched by June 1. ‘The infested wheat was planted on November 5, 
1933, On land said to have been in grass for 2 years. It was expected that 
sone of the various grasses now fairly common in the field would be found 
badly attacked by this weevil but, as a matter of fact, wheat seams to be pre~ 
ferred in this field. © In the various grasses examined only one eg¢ was found | 
and this was in timbthy. ne oer oe 
Bollworm and tobacco budworm attack flax in Georgia.--G. W. Barber, 
Savannah, Gae, reports an outbreak of caterpillars of Heliothis obsoleta Fabe 
and H. virescens Fab. near Estill, S.C. Here, 500 acres of flax is being 
grown for the purpose of studying the possible production of flax in the South. 
In this crop, considerable infestation by these species of Heliothis occurred — 
during the last 4 weeks of May. Injury was of two types. In flax planted in 
March, and in which seed bolls were available, the caterpillars attacked the 
green bolls, hollowing out the contents. . In several fields showing this type 
of injury, planters estimated a possible damage of 30 percent of the ‘seed. In 
fields planted in April, and in which seed bolls. had not- developed, the cater= — 
pillars attacked the flower buds, the incipient seed pods, the tender leaves, 
and the tender stems at the tips of the plants. By May 24 plants in these 
fields had about their upper fourth wholly devoured. This: type of injury re= 
sulted in somewhat ‘sredter damage to the crop than in earlier plantings. On 
May 28 a severe rain storm, with wind of 35-mile to 40-mile velocity, laid down 
the flax and flooded the fields under observation. - Subsequently, only large 
caterpillars of the species mentioned were found in the field and most of the 
small larvae evidently were knocked from the plants and drowned. By May 31 
caterpillars had become scarce but moths of both species were abundant. Both 
larvae and moths appeared to ocaur in about the proportion of one of He 
virescens to five of H. obsoleta, 

Effects of warm weather on alfalfa weevil.--G. I. Reeves, Salt Lake 
City, Utah, reports that "May has been characterized by a continuation of the 
exceptionally warm weather that prevailed throughout the winter and spring in 
the entire area ‘infested by the alfalfa weevil. ‘This has resulted in an un= 
usually early me'turity of the alfalfa crop, an unusual opportunity for wee~ 
vil oviposition, am great activity on the part of Bathyplectes curculionis 
(Thompson), the icheumonid parasite, It has also furnished a rare opportunity 
to determine the long-suspected damping effect of early mild spring weather 
upon oviposition, which explains why the weevil is not a pest in mild climatese 
In general, the attack'of the larvae upon the first crop ran its course and 
ended before the crop was mature, so that in spite of the very long egglay= 
ing season, control measures were rarely necessary. The temptation has been 
éreat, however, for farmers to delay cutting and so rear too many weevils to 
maturity and store up trouble far (AS toe Class 
Spread of Trichogramma minutum Riley.--H,. A, Jaynes. Jeanerette, Lae, 
reports that an experiment to determine the distribution and spread of 
Trichogramma’ was carried on in a sugarcane field near that place, during the 
latter part of April and early in May. ‘Two sets of 40 stakes were arranged 
