Wind-pollinated pecans are dependent on good weather during the time.

49 rowsOct 20, If pecans are stressed in the fall, they will not set a large crop the following year, and the tree will survive on food stored in the trees’ massive limb, trunk and root system. On weak trees, the crop is shed by various ways throughout the season.

This could be physiological drop, pollination drop, casebearer drop or waterstage drop. Jul 30, Water stage in later July and early August is the most common form of pecan drop. As the nuts move from size development into kernel formation the pecan sheds very easily.

Any stress received by the tree at this stage can result in major fruit drop. Some trees can lose up to one half of its crop if not properly managed during water stage. Apr 27, Why Are Pecans Falling off the Tree Green?

In most cases, pecan trees drop their nuts in the fall when they are fully ripe and ready to be harvested.

Repeated defoliation from severe downy spot infection can cause losses in nut production and tree vigor.

The husk will start to split and the nutshell beneath the husk will turn brown. When fallen pecans are green, this means something has interfered with the ripening process. Possible reasons. Sep 04, Do you grow pecans? Have you noticed issues with the nuts falling from the tree in summer following pollination? Nut trees can be affected by pecan stem end blight, a disease you’ll want to get ahead of before entire crops are lost.

About Pecans with Stem End Blight. This fungus normally attacks during the water stage of growth and shrubmulching.barted Reading Time: 2 mins. Alternate pecan production (on and off years) is mainly the result of inadequate fertilization. When trees set a large nut crop and there are not enough nutrients for the nuts to mature and for the tree to store enough plant food production will be low the following year.

Early defoliation in the fall usually means no nut crop the next shrubmulching.barted Reading Time: 6 mins. Oct 22, Pecan trees (Carya illinoensis) are widely grown in South Carolina mainly for both their tasty edible nuts and shade. Pecan trees are susceptible to several diseases in our area due to the hot and humid environmental conditions typical of the state. Fortunately, disease or a combination of diseases never reach a level that kills the tree. Jul 12, Inadequate lime or fertilizer- Lack of lime, nitrogen fertilizer and zinc are common limiting factors in pecan production.

Fertilize according to soil and leaf sample recommendations. Apply fertilizer in March on large trees. For young trees, fertilize in March withlime and zinc.