Abstract
A study was conducted on the toxicity potential of six insecticides (Lesenta 80% WG, Trunk 20% SC, Karate 2.5 EC, Route 57 EC, Refree 5% SC and Thimet 5G) against the sugarcane black bug (C. excavatus) at two different locations in tehsil Kot Addu District Muzaffargarh, Pakistan. Seven treatments including control with three replications were maintained following Randomized Complete Block Design (RCBD). The treatments were applied at their recommended doses and mortality data were recorded before and after 24 followed by 48, 72 and 168 hours of application. The results revealed that all the insecticides significantly suppressed the target pest population compared to control. Route 57 EC (Malathion) was revealed as most effective insecticide due to causing highest mortality in both locations 84.29% and 84.44% followed by Trunk 20 % SC (Clothinadion) with 80.03% and 79.88% mortality of the target pest after 168 hours of application. Whereas Karate 2.5 EC (Lambda cyhalothrin) was evaluated as least effective with 51.95% and 52.97% mortality at both locations, respectively. Our results suggest that Route 57 EC (Malathion) @ 500 ml per acre is effective against sugarcane black bug and can be used for the chemical management of this pest. Keyword: Black bug; Efficacy; Insecticides; Malathion; Sugarcane http://dx.doi.org/10.19045/bspab.2020.90180
Highlights
G (C. excavatus) at two different locations in tehsil Kot Addu District Muzaffargarh, Pakistan
The results revealed that all the insecticides significantly suppressed the target pest population compared to control
Black bug mean population data from different plots were analyzed by using analysis of variance (ANOVA) to compare the effectiveness of different insecticides
Summary
Like cotton crop the farmers of this crop are facing lot of problems, both yield and area are declining due to many factors such as water shortage, less economic returns, higher cost of production and low sugar recovery. Black bug (Cavelerius excavatus) (Dist.) is a widely distributed pest and suck cell sap by residing in the whorl of sugarcane crop [11]. It has become a serious pest of sugarcane in some areas in Pakistan such as Kot Bhahi Khan Sugarcane Farm, Yousaf Sugar Mill Shahpur Sargodha. Both adults and Nymphs cause damage by sucking cell sap from the plants. The growth of plant is severely affected by feeding of 4-6 bugs/plant for 4-6 days [13] As this pest attain the status of regular pest and its occurrence gaining attention from sugarcane farmers for its exclusion. Total six insecticides were evaluated for their efficacy against black bug (Table 1)
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