Chemicals on European red mite: Two different methods of evaluation of spray materials for spider mite control used in field tests during 1957 season

Madsen, H

Chemicals on European red mite: Two different methods of evaluation of spray materials for spider mite control used in field tests during 1957 season

Author

Harold F. Madsen

Author Affiliations

Harold F. Madsen is Assistant Entomologist, University of California, Berkeley.

Publication Information

Hilgardia 12(2):8-15. DOI:10.3733/ca.v012n02p8. February 1958.

PDF of full article, Cite this article

Abstract

Variable conditions in the fruit growing areas of California make it difficult to project the results from evaluation tests in one area to another. As a consequence, field plots were established for the 1957 season in Bartlett pear orchards—in Sacramento, Solano, El Dorado, Lake, and Mendocino counties—for University personnel to evaluate spray materials under local conditions. As a correlative evaluation, spray chemicals used in codling moth and aphid control plots were checked for their effects on spider mites.

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

Crown mite damage on spinach: Investigations demonstrate value of early chemical treatment for control of relatively new mite affecting spinach leaves

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