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effect of host plants on the functional response of the acarophagous ladybird beetle, stethorus gilvifrons to tetranychus turkestani
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نویسنده
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bazazzadeh f. ,shishehbor p. ,esfandiari m. ,riddick e. w.
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منبع
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گياه پزشكي - 1400 - دوره : 44 - شماره : 3 - صفحه:29 -42
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چکیده
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The strawberry spider mite, tetranychus turkestani ugarov and nikolski, is an important pest of various field and glasshouse crops in iran. this study aimed to determine the functional response of adult females of stethorus gilvifrons mulsant to different densities of t. turkestani on three fabaceous host plant species: cowpea (vigna unguiculata l.), white bean (phaseolus lunatus l.), and red bean (phaseolus calcaratus roxb.) at 30±2 °c, 60±10 % rh, and a photoperiod of 16l: 8d. beetles were starved for 24 h before testing and then isolated singly for 24 h in 9-cm petri dishes with 4, 8, 12, 24, 48, or 96 adult females of t. turkestani. logistic regression analysis revealed a type iii response on cowpeas. constant (b) and handling time were 0.00718 and 0.3299 h, respectively. in contrast, a type ii response was observed in white beans and red beans. the maximum attack (0.1219 h^-1) and the minimum handling time (0.2301 h) were recorded on white beans and red beans, respectively. the maximum attack rates (t/th) were 72.74, 60.42, and 104.30 eggs/day on cowpeas, white beans, and red beans, respectively. this laboratory study suggests that the plant features affect the capability of s. gilvifrons to respond to changes in a high t. turkestani density.
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کلیدواژه
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attack rate ,handling time ,fabaceae ,strawberry spider mite
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آدرس
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shahid chamran university of ahvaz, faculty of agriculture, department of plant protection, iran, shahid chamran university of ahvaz, faculty of agriculture, department of plant protection, iran, shahid chamran university of ahvaz, faculty of agriculture, department of plant protection, iran, agricultural research service, united states department of agriculture, national biological control laboratory, usa
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Effect of host plants on the functional response of the acarophagous ladybird beetle, Stethorus gilvifrons to Tetranychus turkestani
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Authors
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Bazazzadeh F. ,Esfandiari M. ,Riddick E. W.
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Abstract
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The strawberry spider mite, Tetranychus turkestani Ugarov and Nikolski, is an important pest of various field and glasshouse crops in Iran. This study aimed to determine the functional response of adult females of Stethorus gilvifrons Mulsant to different densities of T. turkestani on three fabaceous host plant species: cowpea (Vigna unguiculata L.), white bean (Phaseolus lunatus L.), and red bean (Phaseolus calcaratus Roxb.) at 30±2 °C, 60±10 % RH, and a photoperiod of 16L: 8D. Beetles were starved for 24 h before testing and then isolated singly for 24 h in 9cm Petri dishes with 4, 8, 12, 24, 48, or 96 adult females of T. turkestani. Logistic regression analysis revealed a type III response on cowpeas. Constant (b) and handling time were 0.00718 and 0.3299 h, respectively. In contrast, a type II response was observed in white beans and red beans. The maximum attack (0.1219 h1) and the minimum handling time (0.2301 h) were recorded on white beans and red beans, respectively. The maximum attack rates (T/Th) were 72.74, 60.42, and 104.30 eggs/day on cowpeas, white beans, and red beans, respectively. This laboratory study suggests that the plant features affect the capability of S. gilvifrons to respond to changes in a high T. turkestani density.
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Keywords
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