University of Khartoum

Studies On The Ecology, Host Range And Possible Control Measures Of Eriophyid Mites (Acarina: Eriophyidae)

Studies On The Ecology, Host Range And Possible Control Measures Of Eriophyid Mites (Acarina: Eriophyidae)

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Title: Studies On The Ecology, Host Range And Possible Control Measures Of Eriophyid Mites (Acarina: Eriophyidae)
Author: Hammad, Ahmed Mohammed Ali
Abstract: In this study, Eriophyid mite species showing different morphological characters and host-plant symptoms were obtained. Five mites species from different hosts were selected and examined carefully. These were recognized as Cisaberoptus kenyae (K.) on Mango Mangifera indica, Acalitus hassani (K.) on Arrak Salvadora persica, Aceria balanites (Massee) on Heglig Balanites aegyptiaca, Colomerus vitis on Grape Vitis sp. (for the first time in the Sudan) and Eriophyes tulipae (K.) on Onion Allium cepa and garlic Allium sativum respectively. The remaining six eriophyid mites were not completely described but designated as Eriophyes sp. 1, 2, 3, 4, 5 and 6 on Sidir Ziziphus spina, Aradeib Tamarindus indica, Harazz, Acacia albida, Talha Acacia seyal var. seyal, Seyal Acacia tortilis var. raddiana and Mormeet Pergia capensis respectively. The response of 12 different plant species infested artificially with Cisaberoptus kenyae (K.), Acalitus hassani (K.) and Eriophyes tulipae (K.) were studied, after two months of infestation. The results showed that onion and garlic plants were severely infested with Eriophyes tulipae (K.) while tomato was found to be susceptible for Cisaberoptus kenyae (K.) and Acalitus hassani (K.) showing moderate infestations. On the other hand, sorghum and wheat infested with Eriophyes tulipae (K.) showed moderate and light infestations respectively. On the contrary, mite infestations were not detected on the rest of plant species. The degree of infestation of Eriophyid mites species on different test plants, measured by symptoms appeared on plant leaves, was studied. Onion bulbs brought from Fadasi in Elhasahesa province was infested with Eriophyes tulipae (K.) and in most instances the damage was extremely high when the samples were obtained from traditional onions stores. Hot-water treatment was shown to be extremely effective against eriophid mite at all levels of temperatures used. The effect reached its maximum at 55°C. Onion bulbs treated with hot-water and stored under cottage and 2 meter-high storage facility showed similar weights by the end of the trial period. However, the other treated bulbs which were stored under room (cool) conditions gave higher weight for the same period of storage than the farmer’s storage conditions.
Description: January, 2004
URI: http://khartoumspace.uofk.edu/handle/123456789/10519
Date: 2015-05-11


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