pecan weevil traps

Wire cone traps are placed on the ground beneath pecan trees with a known history of pecan weevil infestations. Send check for $30.00 plus $3.00 shipping (Texas residents add $4.95 [8.25 percent sales tax]) to: Olde Pecan Book Store, P.O. south eastern states from Florida to west Texas. The trap crop does not have to be continuous around the entire orchard. When fully grown, larvae reach a length of 3/5 inch (Fig. Once larvae have dropped to the ground, they burrow into the soil to a depth of 4 to 12 inches where they create a cell. Therefore, the last week of July would be the ideal time to start monitoring for these weevils by deploying pecan weevil traps (e.g., Circle traps or pyramid/Tedder’s traps). Those traps helped to monitor 640 of Dougherty County’s 16,000-plus pecan acres. Adults are hard shelled beetles about 3/8 inch long with long slender snouts (females have a snout longer than their bodies) and thin legs. This eradication program requires a minimum 3-year period when no larval infestations appear in the harvests. Under normal soil conditions, approximately 80 percent of adult weevils emerge between August 20 and September 10 (Fig. surface. Farmers began setting weevil traps this year as early as mid-June to carefully monitor for weevils. If the trap is inverted, the hot glue will have a better chance of flowinginto the cavities between the ring and hardware cloth. Female weevils do not begin laying eggs until 5 days after they emerge from the soil. 2). Materials 1. Feeding activity of adult weevils, both males and females, before nuts enter the gel stage can cause nut drop. Farmers began setting weevil traps this year as early as mid-June to carefully monitor for weevils. Routine management of the weevil calls for two or three well-timed, late-season applications of insecticide. Irrigation can prevent drought delay but will not accelerate weevil emergence earlier than normal. Trap construction plans or sources for the purchase of traps can be obtained from your local county Extension office. Often times, it is difficult to anticipate the timing if traps are not deployed early enough or if crop maturity is not carefully examined. Even in years where drought delays emergence and traps fail to collect adults, some pecan weevil adults will emerge through soil cracks before gel formation and this justifies the initial treatment. However, these traps are expensive, labor intensive and cannot be used with livestock unless the trap … drought delay adult emergence. Insect traps are another tool in your integrated pest management plan, which you design to balance the economic and environmental considerations of your operation. The pecan weevil is an insidious pest that infests nuts that could otherwise be harvested and used as food. 1). Since this trap works as a visual preference, the tree trunk next to the trap should be painted white to a height of 6 to 8 feet. It is recommended that one trap should be used per tree; no more than a total of 15 traps are needed for 100 acres. Pecan weevil emergence may extend from July into October. of pecan weevils into and within an orchard or landscape environment. His creation, the Circle Pecan Weevil Trap, can minimize damage caused by pecan weevils by helping the grower time his insecticide application to coinside with the emergence of the pecan weevil from the ground. A fairly recent trap that has only been tested for a couple of years in Texas is the Circle trap. Unlike treatment for the pecan nut casebearer, where infestations can vary from year to year by several weeks or more, the initial insecticide application for pecan weevil is applied around August 20 to 22. Small plantings in several selected locations can be enough. The larvae leave the nut and burrow into the soil, remaining there for two to three years before emerging as adults to commence another cycle. By: Bill Ree, Allen Knutson and Marvin Harris. Those traps helped to monitor 640 of Dougherty County’s 16,000-plus pecan acres. 2010) and according to Mulder et al. After shell hardening, males only feed on the shuck and this will not cause nut drop. If adult emergence traps are collecting adult weevils on or after the sixth day following the initial insecticide application, a second application is needed. A second way is to use trunk band traps.

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