Crown mite damage on spinach: Investigations demonstrate value of early chemical treatment for control of relatively new mite affecting spinach leaves
AuthorsW. H. Lange
O. G. Bacon
Authors AffiliationsW. H. Lange is Professor of Entomology, University of California, Davis; O. G. Bacon is Associate Professor of Entomology, University of California, Davis.
Hilgardia 12(2):9-16. DOI:10.3733/ca.v012n02p9. February 1958.
Damage to spinach by the crown mite—Tyrophagus dimidiatus (Hermann) — was first observed to be of economic importance during the spring of 1949 in the Santa Clara Valley. Since that outbreak the mite has caused periodic damage to fall and spring planted spinach in most areas, but is more destructive in the coastal growing regions.
Also in this issue:Parity in marketing orders: Law places limits on federal assistance when marketing order programs are suspended or operated at minimum standards
Aphid parasites established: Natural enemies of spotted alfalfa aphid brought from Middle East expected to be established throughout the state in 1958
Gibberellin on white potatoes: Applied to freshly harvested, resting potato tubers, or used in preharvest foliar sprays, gibberellin promotes sprouting
Gibberellin tested on grapes: Specific responses to sprays shown in fruit set, berry size, and elongation of cluster parts in experiments during 1957
Chemicals on European red mite: Two different methods of evaluation of spray materials for spider mite control used in field tests during 1957 season
Fertilizer trial with plums: Results of tests with Santa Rosa variety in principal plum growing area of Kern County determined by leaf analyses
Micronutrients in the avocado: Effects of nitrogen fertilization on the zinc, copper, iron, manganese and boron content of Fuerte avocado leaves
Manzanita control in ponderosa: Prescribed burning used to kill brush and to deplete seed source in the soil and promote germination of pine seedlings
Grocery store credit service: Credit, like delivery, telephone, and sales service, offered customers is related to characteristics of individual stores
The deposit of aqueous solutions and of oil sprays
The use of selenium in sprays for the control of mites on citrus and grapes