Abstract
Tribolium castaneum (Herbst, 1797) is know as one of main pests of stored canola seeds worldwide, however, the cases of infestation in Brazil are still not reported. Due to its potential pest status allied to the increasing production of canola in Brazil, this work aims to evaluate the establishment of T. castaneum in canola stored seeds, as well as the effects of diferent inert dusts to its control. For stablishment determination, three substrates were tested: wheat bran (control); whole wheat seeds; and whole canola seeds. The insects remained in the substrates for 14 days, when mortality was counted, and then for aditional seven days before get removed, for progeny assessment at 66 days after initial exposure. For the insecticide potential of inert dusts, four treatments were tested in canola seeds as substrate: diatomaceous earth; basaltic rock powder; vegetable charcoal powder; and untreated canola seeds as control treatment. The beetles were exposed to the treated substrate and cumulated mortality was counted each two days for 15 days. Lower adult mortality and higher progeny in canola seeds indicates that these substrate is a potential host for T. castaneum. Diatomaceous earth and vegetable charcoal powder reduced the survival of adult beetles in canola in more than 60% at the end of the evaluation period. The T. castaneum adults and its offspring develops well in stored canola seeds. Additionally, the use of inert dusts, mainly diatomaceous earth and vegetable charcoal powder presents promising results of control of the beetle in stored canola seeds.
Highlights
Tribolium castaneum (Herbst, 1797) is know as one of main pests of stored canola seeds worldwide, the cases of infestation in Brazil are still not reported
The 2019-20 harvest projections indicate a total production of 69 million tons, a little reduction compared to the same period of last year, especially due to general decrease in oilseeds production in this window, a number up to 50% compared to the last decade (USDA-FAS 2019)
The use of sustainable energy as an alternative for non-renewable resources, such as diesel oil of fossiliferous source, should consider the exploitation of potential crops for biodiesel production, responsible for moving the productive chain of the increasing development sector known as agro-energetics (Kohlhepp 2010)
Summary
Tribolium castaneum (Herbst, 1797) is know as one of main pests of stored canola seeds worldwide, the cases of infestation in Brazil are still not reported. The aims of this study were to evaluate establishment and spread potential of T. castaneum in canola storage seeds, as well as your control by using different inert dusts. To evaluate the adaptability capacity of T. castaneum in stored canola seeds it was compared the establishment of the beetle in three different substrates (treatments): whole canola seeds
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