You have been hired to manage crop productivity on a diversified farm that inclu

Question

You have been hired to manage crop productivity on a diversified farm that included strawberry acreage. You are trying to save money by applying pesticides only when needed. Thus, you have adapted the strategy of only treating for the tarnished plant bug (TPB), an economic pest of strawberries, before it reaches its economic injury level. Feeding by the TPB causes cat facing of berries, which ruins their marketability. You are basing your decisions for therapeutic action on the abstract from an older piece of literature that is shown below. You sample 10 blossom clusters. Using the empirically derived economic (i.e., action) threshold, what is the minimum number of TPB you would have to count in your sample of blossom clusters before making a decision to spray an insecticide?

0.2

0.5

1

3

5

9

0.2

0.5

1

3

5

9

Explanation / Answer

Answer - 9

According to mailloux and bostanian 1988, The economic injury level (EIL) was estimated to be at 0.95-0.99 TPB nymphs per blossom cluster when strawberry weight was considered. At this density 13% of the berries showed signs of TPB injury at harvest and unacceptable level of fresh market consumption.

Here 10 blossom samples are considered = 0.95 X 10 = 9.5 TBP nymphs

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.