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Field Response of the Southern Pine Beetle to Behavioral Chemicals
Field tests were conducted in East Texas to evaluate the influence of 7 behavioral chemicals on the flight and landing behavior of the southern pine beetle, Dendroctonus frontalis Zimmerman, and verbenone synergized the activity of frontalin and substituted for host tree volatiles, α -pinene and loblolly turpentine.
Understanding choice of oviposition sites and dispersal behavior is important for the design of successful larval control programs including those using predatory mosquito larvae, and prospects for genetic control by sterile males or genes rendering mosquitoes harmless to humans will depend on competitive mating behavior.
Artificial defoliation effect on Populus growth, biomass production, and total nonstructural carbohydrate concentration
Vitality of the tree, as indicated by total nonstructural carbohydrate content, was affected only slightly by increasing defoliation, and the impact of artificial defoliations on Populus growth, biomass production, and total non Structural carbohydrate concentration was examined.
Genus Zelus Fabricius in the United States, Canada, and Northern Mexico (Hemiptera: Reduviidae)
Nine species of Zelus Fabricius 1803 are found in the United States, Canada, and northern Mexico and several of these are among the most commonly encountered reduviids in the Nearctic.
Characterization of a Bacillus thuringiensis delta-endotoxin which is toxic to insects in three orders.
The first Bacillus thuringiensis (Bt) toxin which is toxic to insects from three insect orders (Diptera, Coleoptera, and Lepidoptera) is reported here, which was not dependent on presolubilization.
Feeding and oviposition preferences of adult cottonwood leaf beetles (Coleoptera : Chrysomelidae) among populus clones and leaf age classes
Direct correlations were found between leaf consumption and percentage of leaf consumed and the distribution of egg masses among the leaf age classes and Quadratic relationships between Leaf plastochron index and Percentage of Leaf consumed and leaf age class are suggested by the data from both types of tests.
A taxonomic monograph of the assassin bug genus Zelus Fabricius (Hemiptera: Reduviidae): 71 species based on 10,000 specimens
Abstract The New World assassin bug genus Zelus Fabricius, 1803 (Insecta: Hemiptera: Heteroptera: Reduviidae: Harpactorinae: Harpactorini) is revised based on more than 10,000 specimens. Seventy-one
Cottonwood leaf beetle (Coleoptera: Chrysomelidae) defoliation impact on Populus growth and above‐ground volume in a short‐rotation woody crop plantation
Until adequate pest‐resistant clones can be developed and natural enemy complexes better understood, chemical (biorational and organic) and cultural control may be used to reduce impacts of herbivorous pests.
Biology and management of insect pests in North American intensively managed hardwood forest systems.
Intensively managed hardwood forest systems (IMHFS), grown using conventional agricultural as well as forestry methods, can help alleviate potential problems in natural forest production areas, but the ecologically simplified, monocultural systems may greatly increase the crop's susceptibility to pests.
Clonal and Leaf Age Variation in Populus Phenolic Glycosides: Implications for Host Selection by Chrysomela scripta (Coleoptera: Chrysomelidae)
It is suggested that salicin and salicortin content do not negatively influence host selection but that tremulacin may negatively influence such behavior.