Abstract
An open field was chosen at El Mahala El Kobra district, El Gharbia governorate. An area of about one faddan (about 4200 m2) was cultivated by cantaloupe seed (variety, Egyptian Galia Melon). N. californicus individuals were released in each predator’s area, once in the first half plots and twice in the second half plots (at two weeks intervals), at the rate of 3, 6 and 9 individuals/2plants in the first and second three treatments of once and twice releases, respectively. A single release of N. californicus provides low reduction for the red spider mites, T. urticae. This unlikely those obtained from the double release which provides preferable results on controlling the red spider mite, T. urticae. On the other hand, one release of the predatory mite, N. californicus with the medium rate (6 predators/ 2 plants) or low rate (3 predators’ 2 plants), as well as releasing the predator two releases with the low rate resulted in low mite reduction. In conclusion, under the open field conditions, our results showed a preference for utilizing multiple releases of the predatory mite, N. californicus to regulate the populations of T. urticae. Either moderating reduction or not prevent T. urticae from exceeding the economic threshold level.
Highlights
The Cucurbitaceae family includes several species of cultivated plants of great economic importance, including watermelon (Citrullus lanatus L.), squash (Cucurbita maxima L.), cucumber (Cucumis sativus L.) and cantaloupe (Cucumis melo L.) (Ritschel et al, 2004)
Data of single release of the predatory mite, N. californicus on cantaloupe plants to control the two-spotted spider mite, T. urticae are presented in table (1)
Data of double release of the predatory mite, N. californicus on cantaloupe plants to control the two-spotted spider mite, T. urticae are presented in table (2)
Summary
The Cucurbitaceae family includes several species of cultivated plants of great economic importance, including watermelon (Citrullus lanatus L.), squash (Cucurbita maxima L.), cucumber (Cucumis sativus L.) and cantaloupe (Cucumis melo L.) (Ritschel et al, 2004). Cantaloupe is one of the most consumed fruit crops worldwide especially in Egypt due to its sweaty flavour and nutritional value. Cantaloupes are a diverse group of fresh, dessert fruits that includes the orange flesh cantaloupes, green flesh honeydew, and mixed melons. From an environmental and economic perspective, it is very important that plant byproducts produced by agro-food industry be used in food industry. Mayonnaise, the most famous consumption by youth and child in Egypt and many countries, undergo oxidative degradation during storage, resulting in alteration of major quality parameters affecting its suitability for consumption.
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