We report here on controlled experi-ments in which an egg parasitoid (Trichogramma os-triniae) was released inoculatively (75,000 females ha 1) early in the growing season (when corn plants were at the early to mid-whorl stage) to test its efficacy as a biological control agent of O. nubilalis. Test sites consisted of three 5‐ha pheromone‐treated fields, with MD dispenser densities of 67 dispensers/ha, 100 and 167, respectively. 2A) was more curvilinear than linear, the Miller‐Gut plot (Fig. The total, national on-farm value is estimated at US$ 800 million (Pike 2003). The distance between different treatments was about 1 km. Pheromone‐treated fields required two to three insecticide applications, whereas the conventional‐practice field required seven to eight applications (often once a week). Conopomorpha sinensis Ten basins were placed in trial fields and the distances between basins were at least 50 m. The basins were filled with 0.1%–0.2% synthetic detergent solution and placed at a height of 10 cm above the ground. The preliminary trial was carried out in Yanqing County (40.47°N, 115.97°E), Beijing, from April 30 to July 1, 2008, to determine the efficacy of different densities of MD dispensers set in the field. Although some research indicated that mating was not suppressed and the population did not decrease when the experimental design eliminated insect movement between plots (Schroeder et al., 2000), MD is an important component in integrated pest control. Treatments. Effects of Temperature on Emergence Dynamics of Studies were conducted in commercial sweet corn fields in upstate New York to collect information for developing a sampling protocol for egg masses and larvae of European corn borer (ECB), Ostrinia nubilalis (Hübner). © 2008-2020 ResearchGate GmbH. During our experiments, low levels of other cabbage pests, such as aphids, leaf miners and thrips, were observed but did not require control. 2B) was a straight line with a positive slope, and the Miller‐de Lame plot (Fig. The total mean number of moths caught per trap per 2 days in the blank control field was 84, which was significantly higher than the number of trapped moths caught in pheromone‐treated and conventional‐practice fields (5 and 6, respectively). The maximum number of larvae was 16 and 12 larvae per 10 plants, respectively. This manuscript and the authors of the manuscript are not involved in any potential conflicts of interest, including financial interests and relationships and affiliations. Analyses of data indicated that distribution of egg masses and larvae throughout a field was essentially random with no evidence to support the hypothesis that eggs were preferentially laid near field borders where mating and resting of female adults occurred. The diamondback moth (DBM), Plutella xylostella (L.) (Lepidoptera: Plutellidae), is the most widely distributed species, and occurs wherever cruciferous crops are grown. The Zhangjiakou trial was conducted from May 25 to August 5 and consisted of a 10‐ha pheromone‐treated field, a 6‐ha conventional‐practice field and a 1.5‐ha blank control field. Efficacy was positively correlated with MD dispenser density. Integrating Biological and Chemical Controls in Decision Making: European Corn Borer (Lepidoptera: Crambidae) Control in Sweet Corn as an Example, Effects of Timing and Insecticide on Management of Helicoverpa zea (Lepidoptera: Noctuidae) in Sweet Corn (Poales: Poaceae), Effect of Inoculative Releases of Trichogramma ostriniae on Populations of Ostrinia nubilalis and Damage to Sweet Corn and Field Corn, Binomial Sequential Sampling Plans for Late Instars of European Corn Borer (Lepidoptera: Crambidae), Corn Earworm (Lepidoptera: Noctuidae), and Damaged Kernels in Sweet Corn Ears, Advances in United States Sweet Corn and Snap Bean Insect Pest Management, Predicting Risk of European Corn Borer Infestation in Sweet Corn Based on Harvest Date, Bt Sweet Corn and Selective Insecticides: Impacts on Pests and Predators, Controlling European Corn Borer (Lepidoptera: Pyralidae) on Successionally Planted Sweet Corn in Western Massachusetts, Timing of Insecticide Applications for European Corn Borer1 Control! This work was funded by grants from the National Basic Research and Development Program, China (2009CB119004), Special Fund for Agro‐scientific Research in the Public Interest (201103021) and the Natural Science Foundation of China (31071709). x���QO�0��#�;�c�T�w�[BH�B�R�F����&D�i���}{��c�m�&R�|���?��Ӳ�������贪���-a���m��ڸhj���U�.���]U��8�t�� ����g1d?��G8�̓h���(A����A�����0P�X���W���D1���*�˕͜���6[�����g�O�@@?� �lT�`*�DK�cH�����L� �0����U��u�.�O� Ѵ6i2��n�p@R3j��š��0V�ż���o�>(N�ȑ��V�v����1@J�*�P�J�dI�J�[�ǭ��my�aF��\0ib&��cD�&�gR((���f;�n�/��[o*WZ������k�P���~C��>L=}���g��bZ�K���N��^E���G�e�檐��`q�B�W����̋Ǧ�O�����_�r�g�X�%�?�.����ѩ�R��� ��A�ZE� Snap beans are grown for processing on about 100,000 ha nationally, with an on-farm value of ca. Application of synthetic sex pheromone for management of diamondback moth, Mating disruption or mass trapping? Generally, the numbers of eggs and larvae in the pheromone‐treated field were fewer than those in the conventional‐practice field. The results for sweet corn demonstrated that inocula-tive releases of T. ostriniae provide suppression of O. nubilalis populations adequate to reduce damage significantly. The Pyralidae includes the cornstalk borers, carpenterworm and American plum borer, to name a few. This study aimed to evaluate the efficacy of transgenic Bt corn to control ear corn pests. Chlorantraniliprole produced inconsistent results in year 1 but had significantly higher percentages of clean sweet corn ears compared with lambda-cyhalothrin in year 2. As growers switch to transgenic crops and selective insecticides that are less toxic to natural enemies, natural enemies can become more important in agricultural pest management. Plots consisted of seven 25-ft rows of sweet corn on 30-inch centers with 9-inch plant spacing. Comparison of the number of larvae (B) or eggs (C) infested on plants in conventional‐practice field and pheromone‐treated field (2009). stream 3C, 4C). 2 0 obj The number of eggs peaked on May 15, reaching 110 and 391 eggs per 10 plants in the pheromone‐treated and conventional‐practice fields, respectively. Silwet L-77 spray adjuvant was applied at 0.1% v/v with all treatments. The second most effective density was 100 dispensers per ha; here the population decreased by 34%. The result of this integration is a dynamic threshold that varies for each product and the level of biological control expected. In the Yanqing County trial, the number of eggs and larvae per 10 plants were significantly fewer in the pheromone‐treated field compared with the conventional‐practice field (Fig. The lure was suspended 1 cm above the surface of the detergent solution and was renewed every 20 days. Number of times cited according to CrossRef: Expression Profiles and Binding Properties of the Chemosensory Protein PxylCSP11 from the Diamondback Moth, Plutella xylostella (Lepidoptera: Plutellidae). The moth Lobesia botrana (Denis & Schiffermüller) (Lepidoptera: Tortricidae) feeds on grapes (Vitis vinifera L.), reducing yield and increasing susceptibility to fungal infections. Grain yields of 65 + q/ha were achieved with methomyl applications at leaf stages 4 and 6 of 'Pioneer X304C,' leaf stages 4, 6, and 14 of 'Pioneer 3369A,' and methomyl (0.84 kg of AI/ha) protection of the ear stages of both varieties. A density of 167 MD dispensers per ha produced an average population decrease of about 50% compared to the conventional‐practice field. A field trial conducted in Florida showed pheromone treatment protected cabbage from damage by P. xylostella, despite the lack of isolation from other cabbage fields and heavy moth infestations in adjacent fields (McLaughlin et al., 1994). All treatments provided 100-95% undamaged ears. Our results suggest mating disruption coupled with minimal insecticidal supplements is a promising solution for resistance management and control of diamondback moth infestation. Therefore, we only compared the pheromone‐treated and the conventional‐practice fields. New products that specifically target the pest species, while being relatively benign to other insects, could provide more integrated control. Use the link below to share a full-text version of this article with your friends and colleagues. In both trials, P. xylostella severely damaged cabbage plants in the blank control plots. Among the various control alternatives, the use of pheromones has attracted interest because pheromones are pest‐specific, non‐toxic to humans and beneficial organisms, less prone to pest resistance and more eco‐friendly than pesticides.


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