Response of Two Cultivars of Cauliflower to Simulated Insect Defoliation

Autor:	Mark K. Sears, Jeff G. Stewart, Kenneth B. McRae
Rok vydání:	1990
Předmět:	Ecology biology fungi food and beverages Brassica oleracea var botrytis General Medicine biology.organism_classification Hyponomeutidae Lepidoptera genitalia Transplantation Horticulture Cabbage looper Agronomy Insect Science Cultivar PEST analysis Insect defoliation
Zdroj:	Journal of Economic Entomology. 83:1499-1505
ISSN:	1938-291X 0022-0493
Popis:	Cauliflower cultivars ‘Snowball Y’ and ‘Polar Express’ were defoliated every week by 0, 8, 18, 36, and 58% during the interval of growth from transplantation to head initiation (Period 1); from head initiation to harvest (Period 2); or from transplantation to harvest (Period 3). Leaf area at harvest, head weight, and proportion of harvested heads with a diameter of at least 10 cm decreased as the level of defoliation increased. Plants defoliated during Periods 2 and 3 were, in general, more seriously affected than plants defoliated during Period 1. Estimates of the number of cabbage looper equivalents needed to reduce head weight by 1% were higher for plants defoliated during Period 1 compared with plants damaged during Periods 2 or 3.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::973b3935a8567e60ffd96b0b0ced9e70 https://doi.org/10.1093/jee/83.4.1499 Zobrazit plný text záznamu