Crop Management
Frogeye leaf spot, caused by the fungal pathogen, Botryosphaeria obtusa, has been quite prevalent this year, probably due to the combination of potential (and realized) crop loss and our cool, wet spring. This is the same fungus that causes cankers on the tree, along with black rot of apple fruit (Fig. 1). Frogeye leaf spot…Read more about Frogeye leaf spot[Read More]
For those of you still fortunately enough to have apples, disease management continues to a greater degree than those of us without a crop. Around now (the beginning of cover sprays), the most serious apple pathogens are generally less active, terminal buds have set, leaves have hardened off (and are now less susceptible) and weather…Read more about Fungicide Use Midseason and On[Read More]
The periodical cicada (Figure 1) emergence is expected to begin shortly. Female cicadas lay eggs in 200+ woody tree species (Figure 2), and they have a strong preference for grapevines, apples, cherries, peaches, & plums. Egg laying can weaken and damage branches, causing them to turn brown, die, and break off. The loss of branches…Read more about Protect your grapevines from cicadas[Read More]
Freeze: There really isn’t much that can be added to the wonderful and unfortunately timely article about Frost. Critical Temperatures and Frost Protection by Rob Crassweller at https://extension.psu.edu/frost-critical-temperatures-and-frost-protection With a frost to freeze expected to cover most of the state on April 21 and 22, there will certainly be crop damage and loss (Fig. 1)….Read more about Freeze[Read More]
A natural wonder will occur in 15 states this year: the emergence of the Brood X, 17-year periodical cicadas! Also known as “17-year or 13-year locusts” the last mass emergence of these insects occurred in 2004. Now, 17 years later, the immature cicadas will emerge from the ground, molt one last time to gain wings,…Read more about Plan ahead to protect young fruit trees from 17-year periodical cicadas emerging in May[Read More]
With many orchards suffering severe frost damage last year, our expectation is for very heavy flowering this spring. We’ll talk more about thinning next time, but it’s a pretty safe prediction that flowering will be heavy and so growers will really need to have their act together regarding thinning. So make sure now that your…Read more about A word on thinning[Read More]
Warm temperatures over the last week or so have accelerated growth rapidly. In Lafayette, apples are nearing green tip, and strawberries at full bloom. Blackberries are pushing half-inch green. Further south in the state, temperatures are in the mid 70’s, apricots are in full bloom and peaches not quite at pink (thanks to Applacres for…Read more about Crop Conditions[Read More]