www.sare.org publications integrated-pest-management-for-varroa-destructor-in-the-northeastern-united-states-using-drone-brood-removal-and-formic-acid ipm-non-chemical-control-methods ipm-non-chemical-control-methods-page-2 IPM Non-Chemical Control Methods, Page 2 Screen bottom boards Research: Many studies have shown that mites fall off of bees at relatively high rates, even when no chemical treatment is present. Many of these mites are still alive and manage to reacquire a host. It is commonly believed that mite populations can be suppressed if these fallen mites can be removed […]
www.sare.org publications integrated-pest-management-for-varroa-destructor-in-the-northeastern-united-states-using-drone-brood-removal-and-formic-acid ipm-non-chemical-control-methods IPM Non-Chemical Control Methods IPM Non-Chemical Control Methods Drone brood removal researchMites are found most often on drone brood where they produce about twice as many offspring as on worker brood. Therefore, by removing capped drone brood from an infected colony, you remove a disproportionately large number of mites without affecting the worker population, and you remove those mites […]
www.sare.org publications integrated-pest-management-for-varroa-destructor-in-the-northeastern-united-states-using-drone-brood-removal-and-formic-acid ipm-chemical-control-methods IPM Chemical Control Methods IPM Chemical Control Methods Available Products Currently, there are three products with Section 3 (General Use) registration available for controlling V. destructor. These are Apistan® (fluvalinate), Mite-Away II™ (formic acid) and Sucrocide™ (sucrose octonaote esters). In addition, CheckMite+® (coumaphos) and Api-Life VAR® (thymol, menthol and eucalyptus oil) have been granted Emergency Exemptions from registration (Section […]
www.sare.org publications integrated-pest-management-for-varroa-destructor-in-the-northeastern-united-states-using-drone-brood-removal-and-formic-acid rationale-for-ipm-program Rationale for IPM Program Rationale for IPM Program Often, infected colonies look strong after the fall flow, and the application of an effective pesticide kills most of the mites present; however, the colony still collapses and dies over the next few weeks or months. Such colonies experienced significant, but less obvious damage while waiting for the fall treatment. The […]
www.sare.org publications integrated-pest-management-for-varroa-destructor-in-the-northeastern-united-states-using-drone-brood-removal-and-formic-acid monitoring-and-thresholds Monitoring and Thresholds Survey methods provide presence/absence information. One such method is the “cappings scratcher,” which requires one to impale a number of capped drone cells with a cappings scratcher, and then to pull the immature drones from their cells for examination (photo D). This method has been found to be highly effective in detecting mites when present […]
www.sare.org publications integrated-pest-management-for-varroa-destructor-in-the-northeastern-united-states-using-drone-brood-removal-and-formic-acid transmission-of-v-destructor Transmission of V. destructor Transmission of V. destructor Robbing by bees is a major source of transmission. As an infected colony become progressively weaker, its defensive capabilities decline, and it becomes susceptible to invasion by workers from nearby colonies (the robbers) seeking its valuable cache of honey. In the process of removing the honey, robbers become infected with mites […]
www.sare.org publications integrated-pest-management-for-varroa-destructor-in-the-northeastern-united-states-using-drone-brood-removal-and-formic-acid life-cycle-of-v-destructor Life Cycle of V. destructor The life cycle of the mite can be divided into phoretic and reproductive phases. The reproductive phase begins when a mature female leaves her adult host, enters a brood cell containing a worker or drone larva shortly before it is capped, and sequesters herself in the bottom of the cell. Soon, the cell is capped; […]
www.sare.org publications integrated-pest-management-for-varroa-destructor-in-the-northeastern-united-states-using-drone-brood-removal-and-formic-acid symptoms-and-damage-of-v-destructor Symptoms and Damage of V. destructor An adult female, V. destructor is elliptical in shape with a width of 1.5 mm, a length of 1.0 mm, and four pairs of legs. Mature female mites are brown, dark brown, or cordovan (photo A). During immature stages, the bodies of V. destructor are light and translucent, but those attributes tend to disappear on […]
www.sare.org publications integrated-pest-management-for-varroa-destructor-in-the-northeastern-united-states-using-drone-brood-removal-and-formic-acid origins-and-distribution-of-v-destructor Origins and Distribution of V. destructor Origins and Distribution of V. destructor V. destructor is an obligate parasite of cavity-dwelling Apis bees. It cannot reproduce on yellow jackets, wasps, bumblebees or any other species. Early reports of this mite on the western honey bee inaccurately identified it as V. jacobsoni Oudemans, which exists in a sustainable association with the eastern honey […]
www.sare.org publications organic-insect-management-in-sweet-corn references References 1. Adams, R. G. and J.C. Clark, eds. 1996. Northeast Sweet Corn Production and Integrated Pest Management Manual. University of Connecticut Cooperative Extension. 120pp. 2. Cook, R. A. Carter, P. Westgate and R. Hazzard. 2003. Direct silk applications of corn oil and Bacillus thuringiensis as a barrier to corn earworm larvae in sweet corn. HortTechnology […]